pi/packages/ai/CHANGELOG.md

Changelog

[0.79.6] - 2026-06-16

Fixed

• Fixed OpenCode Go DeepSeek V4 thinking-off requests to send the provider's thinking: { type: "disabled" } compatibility parameter.

[0.79.5] - 2026-06-16

Added

• Added provider-scoped StreamOptions.env overrides for provider configuration, including Cloudflare endpoint placeholders, Azure OpenAI, Google Vertex, Amazon Bedrock, cache retention, and proxy environment lookups (#5728).

Fixed

• Fixed OpenAI Responses streaming to tolerate null message content from OpenAI-compatible servers before tool calls (#5819).
• Fixed OpenCode DeepSeek V4 thinking requests to avoid sending both thinking and reasoning_effort (#5818).
• Fixed Z.AI GLM-5.2 thinking requests to send reasoning_effort with the provider's high/max effort mapping (#5770).
• Fixed Google and google-vertex Gemini model metadata to map latest aliases to the current models, add Gemini 3.5 Flash for Vertex, correct Gemini 2.5 Flash Vertex cache pricing, and remove shut-down Vertex preview models (#5761).
• Fixed Moonshot AI China model metadata to include Kimi K2.7 Code, and omitted unsupported thinking-off payloads for Kimi K2.7 Code models (#5760).

[0.79.4] - 2026-06-15

Fixed

• Fixed Anthropic 1-hour prompt-cache write cost accounting to price 1-hour cache writes at 2x input instead of the 5-minute cache-write rate (#5738 by @theBucky).
• Fixed GitHub Copilot Claude adaptive-thinking effort metadata to match manually checked Copilot model capabilities (#4637).
• Fixed OpenCode/OpenCode Go completion models that reject prompt_cache_retention to omit long-retention cache fields when cacheRetention is long (#5702).

[0.79.3] - 2026-06-13

Fixed

• Restored OpenAI GPT-5.4/GPT-5.5 and OpenAI Codex GPT-5.4/GPT-5.4 mini/GPT-5.5 context window metadata to the observed 272k-token Codex backend limit, avoiding a billing hazard from sending prompts above Codex's accepted limit (reported by @trethore).

[0.79.2] - 2026-06-12

Added

• Added AWS data retention documentation links to Amazon Bedrock unsupported data retention mode validation errors (#5561 by @unexge).

Fixed

• Fixed OpenAI-compatible context overflow detection for parenthesized maximum context length (N) errors (#5677).
• Fixed OpenAI GPT-5.4/GPT-5.5 and OpenAI Codex GPT-5.4/GPT-5.4 mini/GPT-5.5 context window metadata to match current OpenAI limits (#5644).
• Increased the OpenAI Codex Responses SSE response-header timeout to 20 seconds to reduce false-positive stalls while retaining the bounded wait introduced for zero-event hangs (#4945).
• Fixed Anthropic refusal stops to preserve provider stop_details explanations in error messages (#5666 by @rwachtler).
• Fixed Claude Fable 5 thinking-off requests to omit Anthropic's unsupported thinking.type: "disabled" payload (#5567 by @tmustier).

[0.79.1] - 2026-06-09

Added

• Added Claude Fable 5 to Anthropic and Amazon Bedrock model metadata, with adaptive thinking and xhigh effort support.

Fixed

• Fixed Amazon Bedrock inference profile ARN region resolution to prefer the ARN's embedded region over AWS_REGION (#5527 by @AJM10565).
• Fixed z.ai thinking-off requests to send the provider's thinking: { type: "disabled" } compatibility parameter (#5330).
• Fixed OpenCode completions model metadata to send explicit maxTokens as max_tokens (#5331).
• Fixed Moonshot Kimi thinking-off requests to send the provider's thinking: { type: "disabled" } compatibility parameter (#5531).
• Fixed Azure OpenAI Responses requests to disable server-side response storage (#5530).
• Fixed Azure GPT-5.4 and GPT-5.5 context window metadata to 1,050,000 tokens, matching Azure Foundry deployments instead of OpenAI's 272k limit (#5559).
• Fixed OpenAI and Azure GPT-5 Pro maxTokens metadata to 128,000, correcting an upstream value that duplicated the 272,000 input sub-limit as the output limit (#5559).

[0.79.0] - 2026-06-08

Fixed

• Fixed OpenAI Responses custom providers to honor compat.supportsDeveloperRole: false for reasoning models (#5456).
• Fixed OpenRouter routing preferences on OpenAI-compatible custom providers to send compat.openRouterRouting even when baseUrl does not point directly at OpenRouter (#5347).

[0.78.1] - 2026-06-04

Added

• Added Ant Ling as a built-in OpenAI-compatible provider with Ling 2.6 and Ring 2.6 models.
• Added MiniMax-M3 model to the minimax and minimax-cn direct providers, and removed the hardcoded context-window override that was masking models.dev values (#5313).
• Added NVIDIA NIM as a built-in OpenAI-compatible provider, exposing public NIM models that support tool use.

Fixed

• Fixed Amazon Bedrock requests to replace blank required user/tool-result text with a placeholder and skip blank replay text blocks (#4975).
• Fixed Anthropic Claude Opus 4.7+ requests to suppress deprecated temperature parameters (#5251 by @yzhg1983).
• Fixed OpenAI GPT-5.5 generated metadata to omit unsupported minimal thinking (#5243).
• Fixed OpenRouter Kimi K2.6 thinking replay and preserved developer-role instructions for OpenRouter OpenAI and Anthropic models (#5309).
• Fixed OpenRouter reasoning instruction requests to preserve the system role when required (#5221 by @PriNova).
• Restored the NVIDIA Qwen 3.5 122B NIM model.

[0.78.0] - 2026-05-29

Breaking Changes

• Changed direct provider stream functions to require explicit options.apiKey; top-level stream*/complete* helpers still resolve built-in environment auth.

Added

• Added custom Amazon Bedrock request header support via StreamOptions.headers, excluding reserved AWS signing headers (#5178 by @stephanmck).

Fixed

• Fixed OpenRouter Moonshot Kimi K2.6 requests to use system instead of unsupported developer messages (#5159).
• Fixed OpenCode Go Kimi K2.6 thinking requests to send thinking objects instead of invalid string values, and fixed OpenCode Zen Grok Build thinking requests to omit unsupported reasoning_effort (#5169).
• Fixed OpenAI Codex Responses SSE streams to abort response body reads after terminal events.
• Fixed OpenCode Kimi K2.6 generated metadata to use Anthropic-style thinking metadata instead of invalid reasoning-effort parameters.

[0.77.0] - 2026-05-28

Added

• Added OpenAI Codex subscription device-code login as a selectable headless alternative while keeping browser login as the default (#4911 by @vegarsti).
• Added Claude Opus 4.8 model metadata for Anthropic and updated Opus adaptive-thinking coverage to use it.

Fixed

• Fixed OpenRouter DeepSeek V4 xhigh reasoning metadata to preserve OpenRouter's native effort instead of sending DeepSeek's max effort (#4801).
• Fixed OpenAI Codex Responses replay after switching from Anthropic extended-thinking sessions by generating unique fallback message item IDs for converted thinking/text blocks (#5148).
• Fixed Anthropic-compatible replay for providers that return empty thinking signatures by adding an opt-in allowEmptySignature compatibility flag (#4464).
• Fixed OpenAI and OpenRouter GPT-5.5 Pro thinking level metadata to expose only supported medium, high, and xhigh efforts.
• Fixed OpenCode Go Kimi K2.6 thinking-off requests to send thinking: "none" (#5078).
• Fixed Xiaomi Token Plan model metadata to omit unsupported mimo-v2-flash variants (#5075).

[0.76.0] - 2026-05-27

Fixed

• Fixed OpenAI Codex Responses cache-affinity headers to send session-id instead of proxy-incompatible session_id (#4967).
• Fixed openai-codex/gpt-5.3-codex-spark generated metadata to use its 128k context window (#4969).
• Fixed OpenRouter/Poolside context overflow detection for maximum allowed input length errors (#4943).
• Fixed OpenAI Codex Responses WebSocket streams and SSE response-header waits to apply bounded timeouts instead of waiting indefinitely when no events arrive (#4945).
• Fixed provider retry controls so OpenAI Codex Responses honors maxRetries, SDK retries default to 0, and quota/billing 429s are not retried behind Pi's retry handling (#4991 by @mitsuhiko).

[0.75.5] - 2026-05-23

Breaking Changes

• Changed OAuthLoginCallbacks to require onDeviceCode and onSelect, so OAuth providers can rely on pi supplying device-code and selection UI callbacks (#4788 by @vegarsti).

Fixed

• Fixed custom Anthropic-compatible model aliases for adaptive-thinking Claude models by adding compat.forceAdaptiveThinking model metadata and moving built-in adaptive-thinking selection out of provider id substring checks (#4797 by @mbazso).
• Fixed GitHub Copilot OAuth login to rely on the required device-code callback without a runtime callback availability guard (#4788 by @vegarsti).
• Fixed Amazon Bedrock provider loading under strict package managers by declaring its direct @smithy/node-http-handler dependency (#4842).
• Fixed Amazon Bedrock Claude requests to send the model output token cap by default, matching Anthropic requests and avoiding Bedrock's 4096-token default truncation (#4848).

[0.75.4] - 2026-05-20

Changed

• Changed source syntax to avoid TypeScript constructs that require JavaScript emit, keeping the package compatible with Node.js strip-only TypeScript checks.
• Removed the package-level development watch scripts now that the root TypeScript check validates strip-only-compatible sources.

Added

• Added first-class OAuth device-code callback metadata, shared polling support, and GitHub Copilot OAuth integration.

Fixed

• Fixed OpenAI-compatible streamSimple() requests to stop sending model-derived default output token caps, avoiding context-window reservation failures on servers such as vLLM while preserving explicit maxTokens and required Anthropic max_tokens handling (#4675).
• Fixed OpenAI prompt cache keys to clamp session-derived values to the 64-character API limit across OpenAI Responses, Chat Completions, Codex Responses, and Azure OpenAI Responses (#4720).

[0.75.3] - 2026-05-18

[0.75.2] - 2026-05-18

Fixed

• Fixed Xiaomi MiMo generated model metadata to replay assistant tool-call messages with reasoning_content for thinking-mode multi-turn requests (#4678).

[0.75.1] - 2026-05-18

Fixed

• Fixed Anthropic-compatible API-key requests to ignore unrelated ANTHROPIC_AUTH_TOKEN environment values, avoiding invalid bearer credentials for providers such as Xiaomi MiMo (#4342).
• Fixed Amazon Bedrock message conversion to skip unknown content blocks instead of failing the stream (#4223).
• Fixed Azure OpenAI Responses and OpenAI Responses error formatting to prefix HTTP status codes onto errorMessage, so transient 5xx and 429 errors are correctly matched by the agent-level auto-retry classifier (#4232).
• Fixed Xiaomi MiMo model metadata to use the OpenAI-compatible endpoints and openai-completions API, restoring multi-turn thinking/tool-call sessions (#4505).
• Fixed OpenCode Go Kimi reasoning replay by normalizing streamed reasoning fields back to reasoning_content for OpenCode Go only (#4251).

Removed

• Removed non-working OpenAI Codex fast model variants.

[0.75.0] - 2026-05-17

Breaking Changes

• Raised the minimum supported Node.js version to 22.19.0.

Fixed

• Fixed OpenAI Codex generated model metadata to use the current upstream model list (#4603 by @mattiacerutti).
• Fixed GitHub Copilot GPT model thinking metadata to map unsupported minimal thinking to low (#4622 by @mattiacerutti).
• Fixed streamSimple() defaults for models whose advertised output limit is effectively their full context window to avoid impossible default requests (#4614).

[0.74.1] - 2026-05-16

Added

• Added image generation APIs, image model metadata, and built-in OpenRouter image generation support (#3887 by @cristinaponcela).
• Added Together AI as a built-in OpenAI-compatible provider with generated model metadata and TOGETHER_API_KEY authentication (#3624 by @Nutlope).

Fixed

• Fixed GitHub Copilot model availability to ignore generic GH_TOKEN and GITHUB_TOKEN environment variables, requiring OAuth login or COPILOT_GITHUB_TOKEN instead (#4485).
• Fixed openai-completions streams to surface an error when the stream ends before any terminal finish_reason, so truncated responses can retry instead of being accepted as success (#4345).
• Fixed Fireworks provider caching compatibility by adding session affinity headers and model metadata compat settings (#4358 by @yanirz).
• Fixed OpenAI Codex WebSocket transport to respect proxy environment variables under Bun (#4354 by @haoqixu).
• Fixed OpenRouter cache usage normalization to preserve cached-token semantics without treating cached tokens as cache writes.
• Fixed Bedrock proxy handling to preserve NO_PROXY exclusions while using HTTP(S)-only proxy agents.
• Fixed compiled Bun binaries failing to start outside the repo when Bedrock proxy support tried to resolve proxy-from-env from external node_modules (#4513).
• Fixed GitHub Copilot Claude test coverage to use the current Claude Sonnet 4.6 model ID.
• Fixed OpenAI Responses requests for models that support disabling reasoning to send reasoning.effort: "none" when thinking is off.
• Fixed Inception Mercury 2 tool calling on OpenRouter by marking off as unsupported in thinkingLevelMap, so the openai-completions provider omits the reasoning param instead of defaulting to {reasoning:{effort:"none"}} (which puts Mercury 2 in instant mode, disabling tool calls).
• Fixed OpenAI Codex SSE retries to honor retry-after-ms and retry-after headers before falling back to exponential backoff.
• Fixed context overflow detection for LiteLLM-wrapped OpenAI-compatible errors using exceeds the model's maximum context length of ... tokens wording (#4563).
• Fixed streamSimple() defaults to respect model output limits above 32000 tokens instead of clamping provider requests to 32000 (#4539).

[0.74.0] - 2026-05-07

[0.73.1] - 2026-05-07

Added

• Added OAuth login flow metadata so clients can present interactive provider choices during login (#4190 by @mitsuhiko).

Fixed

• Fixed OpenAI Responses reasoning text streaming for LM Studio and other compatible providers that emit response.reasoning_text.delta events (#4191 by @yaanfpv).
• Fixed OpenAI Codex OAuth refresh failures writing directly to stderr while the TUI is active (#4141).
• Fixed OpenAI-compatible chat completion streams that interleave content and tool-call deltas in the same choice.
• Fixed the Kimi K2 P6 model alias to normalize to kimi-for-coding (#4218).
• Fixed OpenAI Codex Responses requests to send a non-empty system prompt (#4184).

[0.73.0] - 2026-05-04

Breaking Changes

• Switched the built-in xiaomi provider endpoint from Token Plan AMS (https://token-plan-ams.xiaomimimo.com/anthropic) to API billing (https://api.xiaomimimo.com/anthropic). XIAOMI_API_KEY now refers to the API billing key from platform.xiaomimimo.com. Users still on Token Plan must move to the appropriate xiaomi-token-plan-* provider and set the corresponding env var (#4112 by @Phoen1xCode).

Added

• Added Xiaomi MiMo Token Plan regional providers with per-region env vars: xiaomi-token-plan-cn (XIAOMI_TOKEN_PLAN_CN_API_KEY), xiaomi-token-plan-ams (XIAOMI_TOKEN_PLAN_AMS_API_KEY), and xiaomi-token-plan-sgp (XIAOMI_TOKEN_PLAN_SGP_API_KEY) (#4112 by @Phoen1xCode).
• Added registerSessionResourceCleanup() and cleanupSessionResources() so providers can register cleanup hooks for session-scoped resources.

Fixed

• Fixed generated OpenAI-compatible model metadata for Qwen 3.5/3.6 and MiniMax M2.7 to match models.dev and OpenCode Go (#4110 by @jsynowiec).
• Fixed Bedrock Converse thinking effort mapping to preserve native xhigh for Claude Opus 4.7.
• Fixed OpenAI Codex Responses WebSocket transport to fall back to SSE when setup fails before streaming starts, and attach transport diagnostics to the assistant message (#4133).

[0.72.1] - 2026-05-02

[0.72.0] - 2026-05-01

Breaking Changes

• Replaced OpenAICompletionsCompat.reasoningEffortMap with top-level Model.thinkingLevelMap for model-specific thinking controls (#3208). Migration: move mappings from model.compat.reasoningEffortMap to model.thinkingLevelMap. See packages/ai/README.md#custom-models and packages/coding-agent/docs/models.md#thinking-level-map. Map values keep the same provider-specific string semantics, and null marks a pi thinking level unsupported. Example:

  // Before
  compat: { reasoningEffortMap: { high: "high", xhigh: "max" } }
  
  // After
  thinkingLevelMap: { minimal: null, low: null, medium: null, high: "high", xhigh: "max" }
  

• Removed supportsXhigh(). Migration: use getSupportedThinkingLevels(model).includes("xhigh") or clampThinkingLevel(model, requestedLevel) instead (#3208).

Added

• Added Xiaomi MiMo Token Plan provider (Anthropic-compatible) with XIAOMI_API_KEY authentication (#4005 by @Phoen1xCode).
• Added Model.thinkingLevelMap, getSupportedThinkingLevels(), and clampThinkingLevel() so model metadata can describe supported thinking levels and provider-specific level values (#3208).

Fixed

• Fixed OpenAI Codex Responses streamSimple() to honor the configured transport instead of always using SSE, and made auto the default transport with cached WebSocket context when available (#4083).
• Fixed Xiaomi MiMo model catalog to use the Token Plan Anthropic endpoint instead of the direct API (#3912).

[0.71.1] - 2026-05-01

Added

• Added websocket-cached transport support for OpenAI Codex Responses used with ChatGPT subscription auth. This keeps the same WebSocket open for a session and, after the first request, sends only new conversation items instead of resending the full chat history when possible.

[0.71.0] - 2026-04-30

Breaking Changes

• Removed built-in Google Gemini CLI and Google Antigravity support, including provider registration, model metadata, OAuth, and package exports. Existing callers must switch to another supported provider.

Added

• Added Cloudflare AI Gateway as a built-in provider with OpenAI, Anthropic, and Workers AI gateway routing plus CLOUDFLARE_API_KEY/CLOUDFLARE_ACCOUNT_ID/CLOUDFLARE_GATEWAY_ID authentication (#3856 by @mchenco).
• Added Moonshot AI as a built-in OpenAI-compatible provider with model catalog generation and MOONSHOT_API_KEY authentication.
• Added Mistral Medium 3.5 model metadata and reasoning-mode handling (#4009 by @technocidal).
• Added AssistantMessage.responseModel on the openai-completions path: surfaces the concrete chunk.model when it differs from the requested id (e.g. OpenRouter auto -> anthropic/...) (#3968 by @purrgrammer).

Fixed

• Fixed Google Vertex Gemini 3 tool call replay by no longer sending the non-Vertex skip_thought_signature_validator sentinel for unsigned tool calls (#4032).
• Updated @anthropic-ai/sdk to ^0.91.1 to clear GHSA-p7fg-763f-g4gf audit findings (#3992).
• Fixed DeepSeek V4 Flash xhigh thinking support so requests preserve xhigh and map it to DeepSeek's max reasoning effort (#3944).
• Fixed Anthropic streams that end before message_stop to be treated as errors instead of successful partial responses (#3936).
• Fixed generated OpenAI-compatible DeepSeek V4 models to carry the provider-specific reasoning effort mapping outside the direct DeepSeek provider (#3940).
• Fixed DeepSeek V4 Flash and V4 Pro pricing metadata to match current official rates (#3910).
• Fixed DeepSeek prompt cache hits to be tracked from prompt_cache_hit_tokens in OpenAI-compatible usage responses (#3880).

Removed

• Removed built-in Google Gemini CLI and Google Antigravity provider, model, OAuth, and export support.

[0.70.6] - 2026-04-28

Added

• Added Cloudflare Workers AI as a built-in provider with model catalog generation, CLOUDFLARE_API_KEY/CLOUDFLARE_ACCOUNT_ID authentication, and OpenAI-compatible streaming support (#3851 by @mchenco).

Fixed

• Removed generated Cloudflare Workers AI User-Agent model headers so attribution can be controlled by callers.
• Fixed Bedrock inference profile capability checks by normalizing profile ARNs to the underlying model name.

[0.70.5] - 2026-04-27

[0.70.4] - 2026-04-27

[0.70.3] - 2026-04-27

Added

• Added Azure Cognitive Services endpoint support for Azure OpenAI Responses base URLs (#3799 by @marcbloech).

Changed

• Changed OpenAI Codex Responses default text verbosity to low when no verbosity is specified.

Fixed

• Fixed API-key environment discovery to fall back to /proc/self/environ when Bun's sandbox leaves process.env empty (#3801 by @mdsjip).
• Fixed Bedrock prompt-caching and adaptive-thinking capability checks to use the model name when the model id is an inference profile ARN (#3527 by @anirudhmarc).
• Fixed Anthropic SSE parsing to ignore unknown proxy events such as OpenAI-style done terminators (#3708).
• Fixed OpenAI-compatible prompt cache tests to cover proxies that explicitly disable long cache retention.
• Stopped sending tools: [] on OpenAI-compatible, Anthropic, OpenAI Responses, OpenAI Codex Responses, and Azure OpenAI Responses requests when no tools are active (e.g. pi --no-tools). DashScope/Aliyun Qwen (OpenAI-compatible) rejects empty tools arrays with "[] is too short - 'tools'" (HTTP 400); the field is now omitted unless the conversation has tool history (the existing LiteLLM/Anthropic-proxy workaround) (#3650 by @HQidea).
• Fixed supportsXhigh() to recognize DeepSeek V4 Pro, preserving xhigh reasoning requests so they map to DeepSeek's max effort (#3662)
• Fixed OpenAI-compatible DeepSeek V4 model replay to include empty reasoning_content on assistant messages when needed, preventing OpenRouter DeepSeek V4 sessions from failing after responses without reasoning deltas (#3668)

[0.70.2] - 2026-04-24

Fixed

• Fixed OpenAI/Azure/Anthropic provider request option forwarding to omit undefined timeout/maxRetries, avoiding SDK validation errors such as timeout must be an integer when provider controls are not set (#3627)

[0.70.1] - 2026-04-24

Added

• Added DeepSeek as a built-in OpenAI-compatible provider with V4 Flash and V4 Pro models and DEEPSEEK_API_KEY authentication.

Fixed

• Fixed DeepSeek V4 session replay 400 errors by adding thinkingFormat: "deepseek" (sends thinking: { type } + reasoning_effort), a reasoningEffortMap, and requiresReasoningContentOnAssistantMessages compat that injects empty reasoning_content on all replayed assistant messages when reasoning is enabled (#3636)
• Fixed GPT-5.5 generated context window metadata to use the observed 272k limit.
• Fixed provider request controls to expose timeoutMs and maxRetries in stream options and forward them through OpenAI/Azure/Anthropic request options, preventing unconfigurable SDK timeout/retry defaults on long-running local inference requests (#3627)

[0.70.0] - 2026-04-23

Added

• Added GPT-5.5 to OpenAI Codex model generation.
• Added findEnvKeys() so callers can identify configured provider API-key environment variables without exposing credential values while preserving getEnvApiKey() as the credential-value API.

Fixed

• Fixed google-vertex to forward custom model.baseUrl values to @google/genai, enabling Vertex proxy and gateway endpoints (#3619)
• Fixed OpenAI-compatible completion usage parsing to stop double-counting reasoning tokens already included in completion_tokens (#3581)
• Fixed long cache retention compatibility by adding compat.supportsLongCacheRetention, allowing Anthropic Messages and OpenAI-compatible proxies to explicitly disable long-retention fields while enabling long retention by default when requested (#3543)
• Fixed openai-responses compatibility by adding compat.sendSessionIdHeader: false, allowing strict OpenAI-compatible proxies to omit the underscore-containing session_id header while still sending other session-affinity headers (#3579)
• Fixed anthropic-messages tool streaming compatibility by adding compat.supportsEagerToolInputStreaming, allowing Anthropic-compatible providers to omit per-tool eager_input_streaming and use the legacy fine-grained tool streaming beta header instead (#3575)
• Fixed supportsXhigh() to recognize openai-codex gpt-5.5, preserving xhigh reasoning requests instead of clamping them to high.
• Fixed openai-completions streamed tool-call assembly to coalesce deltas by stable tool index when OpenAI-compatible gateways mutate tool call IDs mid-stream, preventing malformed Kimi K2.6/OpenCode tool streams from splitting one call into multiple bogus tool calls (#3576)
• Fixed packages/ai E2E coverage to use currently supported OpenAI Responses and OpenAI Codex models, and updated the Bedrock adaptive-thinking payload expectation to match the current display: "summarized" shape.
• Fixed built-in kimi-coding model generation to attach User-Agent: KimiCLI/1.5 to all generated Kimi models, overriding the Anthropic SDK default UA so direct Kimi Coding requests use the provider's expected client identity (#3586)
• Fixed GPT-5.5 Codex capability handling to clamp unsupported minimal reasoning to low and apply the model's 2.5x priority service-tier pricing multiplier (#3618 by @markusylisiurunen)

[0.69.0] - 2026-04-22

Breaking Changes

• Migrated TypeBox support from @sinclair/typebox 0.34.x plus AJV to typebox 1.x plus TypeBox's built-in validator and value-conversion APIs. Tool argument validation now runs in eval-restricted JavaScript runtimes such as Cloudflare Workers and other environments that disallow eval / new Function, instead of being silently skipped. Migration: install and import from typebox instead of @sinclair/typebox, and retest any coercion-sensitive tool paths that serialize schemas to plain JSON because those now go through the new TypeBox-based validation and coercion path rather than AJV (#3112)

Fixed

• Fixed google-gemini-cli built-in model discovery to include gemini-3.1-flash-lite-preview, so Cloud Code Assist model lists expose it without requiring manual --model fallback selection (#3545)
• Fixed transformMessages() to synthesize missing trailing tool results for transcripts that end with unresolved assistant tool calls during direct low-level history replay (#3555)

[0.68.1] - 2026-04-22

Added

• Added Fireworks provider support via Fireworks' Anthropic-compatible Messages API, including built-in models sourced from models.dev and FIREWORKS_API_KEY auth (#3519)

Fixed

• Hardened Anthropic streaming against malformed tool-call JSON by owning SSE parsing with defensive JSON repair, replacing the deprecated fine-grained-tool-streaming beta header with per-tool eager_input_streaming, and updating stale test model references (#3175)
• Fixed Bedrock runtime endpoint resolution to stop pinning built-in regional endpoints over AWS_REGION / AWS_PROFILE, restoring us.* and eu.* inference profile support after v0.68.0 while preserving custom VPC/proxy endpoint overrides (#3481, #3485, #3486, #3487, #3488)

[0.68.0] - 2026-04-20

Added

• Added PI_OAUTH_CALLBACK_HOST support for built-in Anthropic, Gemini CLI, Google Antigravity, and OpenAI Codex OAuth flows, allowing local callback servers to bind to a custom interface instead of hardcoded 127.0.0.1 (#3409 by @Michaelliv)

Changed

• Changed Bedrock Converse requests to omit inferenceConfig.maxTokens when model token limits are unknown and to omit temperature when unset, letting Bedrock use model defaults and avoid unnecessary TPM quota reservation (#3400 by @wirjo)

Fixed

• Fixed openai-completions compat.requiresThinkingAsText assistant replay to preserve text-part serialization and avoid same-model crashes when prior assistant messages contain both thinking and text (#3387)
• Fixed Cloud Code Assist tool schemas to strip JSON Schema meta-declaration keys such as $schema, $defs, and definitions before sending OpenAPI parameters, avoiding provider validation failures for tool-enabled requests (#3412 by @vladlearns)
• Fixed non-vision model requests to replace user and tool-result image blocks with explicit text placeholders instead of silently dropping them during provider payload conversion (#3429)
• Fixed direct OpenAI Chat Completions requests to map sessionId and cacheRetention to OpenAI prompt caching fields, sending prompt_cache_key when caching is enabled and prompt_cache_retention: "24h" for direct api.openai.com requests with long retention (#3426)
• Fixed OpenAI-compatible Chat Completions requests to optionally send aligned session_id, x-client-request-id, and x-session-affinity session-affinity headers from sessionId via compat.sendSessionAffinityHeaders, enabling cache-affinity routing for backends such as Fireworks (#3430)
• Fixed direct Bedrock runtime client construction to pass model.baseUrl through as the SDK endpoint, restoring support for custom Bedrock endpoints such as VPC or proxy routes (#3402 by @wirjo)
• Fixed OpenAI-compatible Chat Completions Anthropic-style prompt caching to apply cache_control markers to the system prompt, last tool definition, and last user/assistant text content via compat.cacheControlFormat, and enabled that compat for OpenCode/OpenCode Go Qwen 3.5/3.6 Plus models so prompt caching works there too (#3392)

[0.67.68] - 2026-04-17

Fixed

• Fixed Bedrock bearer-token authentication to use the SDK's native token auth path and omit Claude thinking.display for GovCloud targets, avoiding duplicate Authorization headers and GovCloud Converse validation errors (#3359)
• Fixed direct Mistral tool definitions to strip TypeBox symbol metadata before passing schemas to the SDK, restoring tool calls after the SDK's stricter outbound validation (#3361)

[0.67.67] - 2026-04-17

Added

• Added Bedrock Converse bearer-token authentication via AWS_BEARER_TOKEN_BEDROCK, enabling API-key style access without SigV4 credentials (#3125 by @wirjo)

Fixed

• Fixed Anthropic and Bedrock adaptive-thinking payload tests to expect the default display: "summarized" field when reasoning is enabled.
• Fixed Mistral Small 4 reasoning requests to use reasoning_effort instead of prompt_mode, restoring default thinking support for mistral-small-2603 and mistral-small-latest (#3338)
• Fixed qwen-chat-template OpenAI-compatible requests to set chat_template_kwargs.preserve_thinking: true, preserving prior Qwen thinking across turns so multi-turn tool calls keep their arguments instead of degrading to empty {} payloads (#3325)
• Fixed OpenAI Codex service-tier accounting to trust the explicitly requested tier when the API echoes the default tier in responses, keeping downstream usage costs aligned with the caller-selected tier (#3307 by @markusylisiurunen)

[0.67.6] - 2026-04-16

Added

• Added onResponse to StreamOptions so callers can inspect provider HTTP status and headers after each response arrives and before the response stream is consumed (#3128)
• Added thinkingDisplay ("summarized" | "omitted") to AnthropicOptions and BedrockOptions, wiring it through to the Anthropic/Bedrock thinking config. Defaults to "summarized" so Claude Opus 4.7 and Mythos Preview keep returning thinking text; set it to "omitted" to skip thinking streaming for faster time-to-first-text-token.

Fixed

• Fixed OpenAI Responses prompt caching for non-api.openai.com base URLs (OpenAI-compatible proxies such as litellm, theclawbay) by sending the session_id and x-client-request-id cache-affinity headers unconditionally when a sessionId is provided, matching the official Codex CLI behavior (#3264 by @vegarsti)

[0.67.5] - 2026-04-16

Fixed

• Fixed Opus 4.7 adaptive thinking configuration across Anthropic and Bedrock providers by recognizing Opus 4.7 adaptive-thinking support and mapping xhigh reasoning to provider-supported effort values (#3286 by @markusylisiurunen)

[0.67.4] - 2026-04-16

Changed

• Added claude-opus-4-7 model for Anthropic, OpenRouter.
• Changed Anthropic prompt caching to add a cache_control breakpoint on the last tool definition, so tool schemas can be cached independently from transcript updates while preserving existing cache retention behavior (#3260)
• Changed Kimi Coding model generation to normalize deprecated k2p5 to kimi-for-coding from models.dev data and removed the old static fallback model list (#3242)

[0.67.3] - 2026-04-15

Fixed

• Fixed google-vertex API key resolution to treat gcp-vertex-credentials as an Application Default Credentials marker instead of a literal API key, so marker-based setups correctly fall back to ADC (#3221 by @deepkilo)

[0.67.2] - 2026-04-14

Fixed

• Fixed direct OpenAI Responses requests to send aligned prompt_cache_key, session_id, and x-client-request-id values when sessionId is provided, improving prompt cache affinity for append-only sessions (#3018 by @steipete)
• Fixed streaming-only partialJson scratch buffers leaking into persisted OpenAI Responses tool calls, which could corrupt follow-up payloads on resumed conversations.

[0.67.1] - 2026-04-13

[0.67.0] - 2026-04-13

Added

• Added full OpenRouterRouting field support, including fallbacks, parameter requirements, data collection, ZDR, ignore lists, quantizations, provider sorting, max price, and preferred throughput and latency constraints (#2904 by @zmberber)

Fixed

• Bumped default Antigravity User-Agent version to 1.21.9 (#2901 by @aadishv)
• Fixed thinking levels for Gemma 4 models to use thinkingLevel and map Pi reasoning levels to the model's supported thinking levels (#2903 by @aadishv)
• Fixed Gemini 2.5 Flash Lite minimal thinking budget to use the model's supported 512-token minimum instead of the regular Flash 128-token minimum, avoiding invalid thinking budget errors (#2861 by @JasonOA888)
• Fixed OpenAI Codex Responses requests to forward configured serviceTier values, restoring service-tier selection for Codex sessions (#2996 by @markusylisiurunen)

[0.66.1] - 2026-04-08

[0.66.0] - 2026-04-08

Fixed

• Fixed bare readline import to use node:readline prefix for Deno compatibility (#2885 by @milosv-vtool)

[0.65.2] - 2026-04-06

[0.65.1] - 2026-04-05

Fixed

• Fixed OpenAI-compatible completions streaming usage to preserve prompt_tokens_details.cache_write_tokens and normalize OpenRouter cached_tokens to previous-request cache hits only, preventing cache read/write double counting in usage and cost calculation (#2802)

[0.65.0] - 2026-04-03

Added

• Added tool streaming support for newer Z.ai models (#2732 by @kaofelix)

Fixed

• Fixed Anthropic context overflow detection to recognize HTTP 413 request_too_large errors, so callers can trigger compaction and retry instead of getting stuck on repeated oversized-image requests (#2734)
• Fixed OpenAI Responses tool-call streaming to emit a toolcall_delta when function call arguments arrive only in response.function_call_arguments.done, and to emit only the missing suffix when .done extends earlier streamed arguments (#2745)
• Fixed Bedrock throttling errors being misidentified as context overflow, causing unnecessary compaction instead of retry (#2699 by @xu0o0)

[0.64.0] - 2026-03-29

Added

• Added opt-in faux provider helpers for deterministic tests and scripted demos: registerFauxProvider(), fauxAssistantMessage(), fauxText(), fauxThinking(), and fauxToolCall().

[0.63.2] - 2026-03-29

[0.63.1] - 2026-03-27

Added

• Added gemini-3.1-pro-preview-customtools model support for the google-vertex provider (#2610 by @gordonhwc)

Fixed

• Fixed context overflow detection to recognize Ollama error responses like prompt too long; exceeded max context length ..., so callers can trigger compaction and retry instead of surfacing the raw overflow error (#2626)

[0.63.0] - 2026-03-27

Breaking Changes

• Removed deprecated direct minimax and minimax-cn model IDs, keeping only MiniMax-M2.7 and MiniMax-M2.7-highspeed. Update pinned model IDs to one of those supported direct MiniMax models, or use another provider route that still exposes the older IDs (#2596 by @liyuan97)

Fixed

• Fixed GitHub Copilot OpenAI Responses requests to omit the reasoning field entirely when no reasoning effort is requested, avoiding 400 errors from Copilot gpt-5-mini rejecting reasoning: { effort: "none" } during internal summary calls (#2567)
• Fixed Google and Vertex cost calculation to subtract cached prompt tokens from billable input tokens instead of double-counting them when providers report cachedContentTokenCount (#2588 by @sparkleMing)

[0.62.0] - 2026-03-23

Added

• Added requestMetadata option to BedrockOptions for AWS cost allocation tagging; key-value pairs are forwarded to the Bedrock Converse API requestMetadata field and appear in AWS Cost Explorer split cost allocation data (#2511 by @wjonaskr)
• Exported BedrockOptions type from the package root entry point, consistent with other provider option types.

Fixed

• Fixed OpenAI Responses replay for foreign tool-call item IDs by hashing foreign function_call.id values into bounded fc_<hash> IDs instead of preserving backend-specific normalized shapes that OpenAI Codex rejects.
• Fixed Anthropic thinking disable handling to send thinking: { type: "disabled" } for reasoning-capable models when thinking is explicitly off, and added payload and env-gated end-to-end coverage for the Anthropic provider (#2022)
• Fixed explicit thinking disable handling across Google, Google Vertex, Gemini CLI, OpenAI Responses, Azure OpenAI Responses, and OpenRouter-backed OpenAI-compatible completions. Gemini 3 models now fall back to the lowest supported thinking level when full disable is not supported, and OpenAI/OpenRouter reasoning models now send explicit none effort instead of relying on provider defaults (#2490)
• Fixed OpenAI-compatible completions streams to ignore null chunks instead of crashing (#2466 by @Cheng-Zi-Qing)

[0.61.1] - 2026-03-20

Changed

• Changed MiniMax model metadata to add missing MiniMax-M2.1-highspeed entries for the minimax and minimax-cn providers and normalize MiniMax Anthropic-compatible context limits to the provider's supported model set (#2445 by @1500256797)

[0.61.0] - 2026-03-20

Added

• Added gpt-5.4-mini model support for the openai-codex provider with Codex pricing metadata and unit coverage (#2334 by @justram)

Fixed

• Fixed validateToolArguments() to fall back gracefully when AJV schema compilation is blocked in restricted runtimes such as Cloudflare Workers, allowing tool execution to proceed without schema validation (#2395)
• Fixed google-vertex API key resolution to ignore placeholder auth markers like <authenticated> and fall back to ADC instead of sending them as literal API keys (#2335)
• Fixed OpenRouter reasoning requests to use the provider's nested reasoning.effort payload instead of OpenAI's reasoning_effort, restoring thinking level support for OpenRouter models (#2298 by @PriNova)
• Fixed Bedrock prompt caching for application inference profiles by allowing cache points to be forced with AWS_BEDROCK_FORCE_CACHE=1 when the profile ARN does not expose the underlying Claude model name (#2346 by @haoqixu)

[0.60.0] - 2026-03-18

Fixed

• Fixed Gemini 3 and Antigravity image tool results to stay inline as multimodal tool responses instead of being rerouted through separate follow-up messages (#2052)
• Fixed Bedrock Claude 4.6 model metadata to use the correct 200K context window instead of 1M (#2305)
• Fixed lazy built-in provider registration so compiled Bun binaries can still load providers on first use without eagerly bundling provider SDKs (#2314)
• Fixed built-in OAuth callback flows to share aligned callback handling across Anthropic, Gemini CLI, Antigravity, and OpenAI Codex, and fixed OpenAI Codex login to resolve immediately after callback completion (#2316)
• Fixed OpenAI-compatible z.ai network_error responses to surface as errors so callers can retry them instead of treating them as successful assistant messages (#2313)
• Fixed OpenAI Responses replay to normalize oversized resumed tool call IDs before sending them back to Codex and other Responses-compatible targets (#2328)

[0.59.0] - 2026-03-17

Added

• Added client injection support to AnthropicOptions, allowing callers to provide a pre-built Anthropic-compatible client instead of constructing one internally.

Changed

• Lazy-load built-in provider modules and root provider wrappers so importing @mariozechner/pi-ai no longer eagerly loads provider SDKs, significantly reducing base startup cost without changing dependency installation footprint (#2297)

Fixed

• Added provider-specific responseId support on AssistantMessage for providers that expose upstream response or message identifiers, including Anthropic, OpenAI, Google, Gemini CLI, and Mistral, and added end-to-end coverage for supported OAuth and API key providers (#2245)
• Fixed Claude 4.6 context window overrides in generated model metadata so build-time catalogs reflect the intended values (#2286)

[0.58.4] - 2026-03-16

[0.58.3] - 2026-03-15

[0.58.2] - 2026-03-15

Fixed

• Fixed Anthropic OAuth manual login and token refresh by using the localhost callback URI for pasted redirect/code flows and omitting scope from refresh-token requests (#2169)

[0.58.1] - 2026-03-14

Fixed

• Fixed OpenAI Codex websocket protocol to include required headers and properly terminate SSE streams on connection close (#1961)
• Fixed Bedrock prompt caching being enabled for non-Claude models, causing API errors (#2053)
• Fixed Qwen models via OpenAI-compatible providers by adding qwen-chat-template compat mode that uses Qwen's native chat template format (#2020)
• Fixed Bedrock unsigned thinking replay to handle edge cases with empty or malformed thinking blocks (#2063)
• Fixed xhigh reasoning effort detection for Claude Opus 4.6 to match by model ID instead of requiring explicit capability flag (#2040)
• Handle finish_reason: "end" from Ollama/LM Studio by mapping it to "stop" instead of throwing (#2142)

[0.58.0] - 2026-03-14

Added

• Added GOOGLE_CLOUD_API_KEY environment variable support for the google-vertex provider as an alternative to Application Default Credentials (#1976 by @gordonhwc)

Changed

• Raised Claude Opus 4.6, Sonnet 4.6, and related Bedrock model context windows from 200K to 1M tokens (#2135 by @mitsuhiko)

Fixed

• Fixed GitHub Copilot device-code login polling to respect OAuth slow-down intervals, wait before the first token poll, and include a clearer clock-drift hint in WSL/VM environments when repeated slow-downs lead to timeout.
• Fixed usage statistics not being captured for OpenAI-compatible providers that return usage in choice.usage instead of the standard chunk.usage (e.g., Moonshot/Kimi) (#2017)
• Fixed tool result images not being sent in function_call_output items for OpenAI Responses API providers, causing image data to be silently dropped in tool results (#2104)
• Fixed assistant content being sent as structured content blocks instead of plain strings in the openai-completions provider, causing errors with some OpenAI-compatible backends (#2008 by @geraldoaax)
• Fixed error details in OpenAI Responses response.failed handler to include status code, error code, and message instead of a generic failure (#1956 by @drewburr)

[0.57.1] - 2026-03-07

Fixed

• Fixed context overflow detection to recognize z.ai model_context_window_exceeded errors surfaced through OpenAI-compatible stop reason handling (#1937)

[0.57.0] - 2026-03-07

Added

• Added per-request payload inspection and replacement hook support via beforeProviderRequest, allowing callers to inspect or replace provider payloads before sending.

[0.56.3] - 2026-03-06

Added

• Added claude-sonnet-4-6 model for the google-antigravity provider (#1859).
• Bumped default Antigravity User-Agent version to 1.18.4 (#1859).

Fixed

• Fixed Antigravity Claude thinking beta header detection to use provider and model capability instead of -thinking suffix, so models like claude-sonnet-4-6 receive the header correctly (#1859).
• Fixed OpenAI Responses reasoning replay regression that dropped reasoning blocks on follow-up turns (#1878)

[0.56.2] - 2026-03-05

Added

• Added gpt-5.4 model support for openai, openai-codex, azure-openai-responses, and opencode providers, with GPT-5.4 treated as xhigh-capable and capped to a 272000 context window in built-in metadata.
• Added gpt-5.3-codex fallback model availability for github-copilot until upstream model catalogs include it (#1853).

Fixed

• Preserved OpenAI Responses assistant phase metadata (commentary, final_answer) across turns by encoding id and phase in textSignature for session persistence and replay, with backward compatibility for legacy plain signatures (#1819).
• Fixed OpenAI Responses replay to omit empty thinking blocks, avoiding invalid no-op reasoning items in follow-up turns.
• Switched the Mistral provider from the OpenAI-compatible completions path to Mistral's native SDK and conversations API, preserving native thinking blocks and Mistral-specific message semantics across turns (#1716).
• Fixed Antigravity endpoint fallback: 403/404 responses now cascade to the next endpoint instead of throwing immediately, added autopush-cloudcode-pa.sandbox endpoint to the fallback list, and removed extra fingerprint headers (X-Goog-Api-Client, Client-Metadata) from Antigravity requests (#1830).
• Fixed @mariozechner/pi-ai/oauth package exports to point directly at built dist files, avoiding broken TypeScript resolution through unpublished wrapper targets (#1856).
• Fixed Gemini 3 unsigned tool call replay: use skip_thought_signature_validator sentinel instead of converting function calls to text, preserving structured tool call context across multi-turn conversations (#1829).

[0.56.1] - 2026-03-05

[0.56.0] - 2026-03-04

Breaking Changes

• Moved Node OAuth runtime exports off the top-level package entry. Import OAuth login/refresh functions from @mariozechner/pi-ai/oauth instead of @mariozechner/pi-ai (#1814)

Added

• Added gemini-3.1-flash-lite-preview fallback model entry for the google provider so it remains selectable until upstream model catalogs include it (#1785, thanks @n-WN).
• Added OpenCode Go provider support with opencode-go model catalog entries and OPENCODE_API_KEY environment variable support (#1757).

Changed

• Updated Antigravity Gemini 3.1 model metadata and request headers to match current upstream behavior.

Fixed

• Fixed Gemini 3.1 thinking-level detection in google and google-vertex providers so gemini-3.1-* models use Gemini 3 level-based thinking config instead of budget fallback (#1785, thanks @n-WN).
• Fixed browser bundling failures by lazy-loading the Bedrock provider and removing Node-only side effects from the default browser import graph (#1814).
• Fixed ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING failures by replacing Function-based dynamic imports with module dynamic imports in browser-safe provider loading paths (#1814).
• Fixed Bedrock region resolution for AWS_PROFILE by honoring region from the selected profile when present (#1800).
• Fixed Groq Qwen3 reasoning effort mapping by translating unsupported effort values to provider-supported values (#1745).

[0.55.4] - 2026-03-02

[0.55.3] - 2026-02-27

[0.55.2] - 2026-02-27

Fixed

• Restored built-in OAuth providers when unregistering dynamically registered provider IDs and added resetOAuthProviders() for registry reset flows.
• Fixed Z.ai thinking control using wrong parameter name (thinking instead of enable_thinking), causing thinking to always be enabled and wasting tokens/latency (#1674 by @okuyam2y)
• Fixed redacted_thinking blocks being silently dropped during Anthropic streaming. They are now captured as ThinkingContent with redacted: true, passed back to the API in multi-turn conversations, and handled in cross-model message transformation (#1665 by @tctev)
• Fixed interleaved-thinking-2025-05-14 beta header being sent for adaptive thinking models (Opus 4.6, Sonnet 4.6) where the header is deprecated or redundant (#1665 by @tctev)
• Fixed temperature being sent alongside extended thinking, which is incompatible with both adaptive and budget-based thinking modes (#1665 by @tctev)
• Fixed (external, cli) user-agent flag causing 401 errors on Anthropic setup-token endpoint (#1677 by @LazerLance777)
• Fixed crash when OpenAI-compatible provider returns a chunk with no choices array by adding optional chaining (#1671)

[0.55.1] - 2026-02-26

Added

• Added gemini-3.1-pro-preview model support to the google-gemini-cli provider (#1599 by @audichuang)

Fixed

• Fixed adaptive thinking for Claude Sonnet 4.6 in Anthropic and Bedrock providers, and clamped unsupported xhigh effort values to supported levels (#1548 by @tctev)
• Fixed Vertex ADC credential detection race by avoiding caching a false negative during async import initialization (#1550 by @jeremiahgaylord-web)

[0.55.0] - 2026-02-24

[0.54.2] - 2026-02-23

[0.54.1] - 2026-02-22

[0.54.0] - 2026-02-19

[0.53.1] - 2026-02-19

[0.53.0] - 2026-02-17

Added

• Added Anthropic claude-sonnet-4-6 fallback model entry to generated model definitions.

[0.52.12] - 2026-02-13

Added

• Added transport to StreamOptions with values "sse", "websocket", and "auto" (currently supported by openai-codex-responses).
• Added WebSocket transport support for OpenAI Codex Responses (openai-codex-responses).

Changed

• OpenAI Codex Responses now defaults to SSE transport unless transport is explicitly set.
• OpenAI Codex Responses WebSocket connections are cached per sessionId and expire after 5 minutes of inactivity.

[0.52.11] - 2026-02-13

Added

• Added MiniMax M2.5 model entries for minimax, minimax-cn, openrouter, and vercel-ai-gateway providers, plus minimax-m2.5-free for opencode.

[0.52.10] - 2026-02-12

Added

• Added optional metadata field to StreamOptions for passing provider-specific metadata (e.g. Anthropic user_id for abuse tracking/rate limiting) (#1384 by @7Sageer)
• Added gpt-5.3-codex-spark model definition for OpenAI and OpenAI Codex providers (128k context, text-only, research preview). Not yet functional, may become available in the next few hours or days.

Changed

• Routed GitHub Copilot Claude 4.x models through Anthropic Messages API, centralized Copilot dynamic header handling, and added Copilot Claude Anthropic stream coverage (#1353 by @NateSmyth)

Fixed

• Fixed OpenAI completions and responses streams to tolerate malformed trailing tool-call JSON without failing parsing (#1424)

[0.52.9] - 2026-02-08

Changed

• Updated the Antigravity system instruction to a more compact version for Google Gemini CLI compatibility

Fixed

• Use parametersJsonSchema for Google provider tool declarations to support full JSON Schema (anyOf, oneOf, const, etc.) (#1398 by @jarib)
• Reverted incorrect Antigravity model change: claude-opus-4-6-thinking back to claude-opus-4-5-thinking (model doesn't exist on Antigravity endpoint)
• Corrected opencode context windows for Claude Sonnet 4 and 4.5 (#1383)

[0.52.8] - 2026-02-07

Added

• Added OpenRouter auto model alias for automatic model routing (#1361 by @yogasanas)

Changed

• Replaced Claude Opus 4.5 with Opus 4.6 in model definitions (#1345 by @calvin-hpnet)

[0.52.7] - 2026-02-06

Added

• Added AWS_BEDROCK_SKIP_AUTH and AWS_BEDROCK_FORCE_HTTP1 environment variables for connecting to unauthenticated Bedrock proxies (#1320 by @virtuald)

Fixed

• Set OpenAI Responses API requests to store: false by default to avoid server-side history logging (#1308)
• Re-exported TypeBox Type, Static, and TSchema from @mariozechner/pi-ai to match documentation and avoid duplicate TypeBox type identity issues in pnpm setups (#1338)
• Fixed Bedrock adaptive thinking handling for Claude Opus 4.6 with interleaved thinking beta responses (#1323 by @markusylisiurunen)
• Fixed AWS_BEDROCK_SKIP_AUTH environment detection to avoid process access in non-Node.js environments

[0.52.6] - 2026-02-05

[0.52.5] - 2026-02-05

Fixed

• Fixed supportsXhigh() to treat Anthropic Messages Opus 4.6 models as xhigh-capable so streamSimple can map xhigh to adaptive effort max

[0.52.4] - 2026-02-05

[0.52.3] - 2026-02-05

Fixed

• Fixed Bedrock Opus 4.6 model IDs (removed :0 suffix) and cache pricing for us.* and eu.* variants
• Added missing eu.anthropic.claude-opus-4-6-v1 inference profile to model catalog
• Fixed Claude Opus 4.6 context window metadata to 200000 for Anthropic and OpenCode providers

[0.52.2] - 2026-02-05

[0.52.1] - 2026-02-05

Added

• Added adaptive thinking support for Claude Opus 4.6 with effort levels (low, medium, high, max)
• Added effort option to AnthropicOptions for controlling adaptive thinking depth
• thinkingEnabled now automatically uses adaptive thinking for Opus 4.6+ models and budget-based thinking for older models
• streamSimple/completeSimple automatically map ThinkingLevel to effort levels for Opus 4.6

Changed

• Updated @anthropic-ai/sdk to 0.73.0
• Updated @aws-sdk/client-bedrock-runtime to 3.983.0
• Updated @google/genai to 1.40.0
• Removed fast-xml-parser override (no longer needed)

[0.52.0] - 2026-02-05

Added

• Added Claude Opus 4.6 model to the generated model catalog
• Added GPT-5.3 Codex model to the generated model catalog (OpenAI Codex provider only)

[0.51.6] - 2026-02-04

Fixed

• Fixed OpenAI Codex Responses provider to respect configured baseUrl (#1244)

[0.51.5] - 2026-02-04

Changed

• Changed Bedrock model generation to drop legacy workarounds now handled upstream (#1239 by @unexge)

[0.51.4] - 2026-02-03

[0.51.3] - 2026-02-03

Fixed

• Fixed xhigh thinking level support check to accept gpt-5.2 model IDs (#1209)

[0.51.2] - 2026-02-03

[0.51.1] - 2026-02-02

Fixed

• Fixed cache_control not being applied to string-format user messages in Anthropic provider

[0.51.0] - 2026-02-01

Fixed

• Fixed cacheRetention option not being passed through in buildBaseOptions (#1154)
• Fixed OAuth login/refresh not using HTTP proxy settings (HTTP_PROXY, HTTPS_PROXY env vars) (#1132)
• Fixed OpenAI-compatible completions to omit unsupported strict tool fields for providers that reject them (#1172)

[0.50.9] - 2026-02-01

Added

• Added PI_AI_ANTIGRAVITY_VERSION environment variable to override the Antigravity User-Agent version when Google updates their version requirements (#1129)
• Added cacheRetention stream option with provider-specific mappings for prompt cache controls, defaulting to short retention (#1134)

[0.50.8] - 2026-02-01

Added

• Added maxRetryDelayMs option to StreamOptions to cap server-requested retry delays. When a provider (e.g., Google Gemini CLI) requests a delay longer than this value, the request fails immediately with an informative error instead of waiting silently. Default: 60000ms (60 seconds). Set to 0 to disable the cap. (#1123)
• Added Qwen thinking format support for OpenAI-compatible completions via enable_thinking. (#940 by @4h9fbZ)

[0.50.7] - 2026-01-31

[0.50.6] - 2026-01-30

[0.50.5] - 2026-01-30

[0.50.4] - 2026-01-30

Added

• Added Vercel AI Gateway routing support via vercelGatewayRouting option in model config (#1051 by @ben-vargas)

Fixed

• Updated Antigravity User-Agent from 1.11.5 to 1.15.8 to fix rejected requests (#1079)
• Fixed tool call argument defaults for Anthropic and Google history conversion when providers omit inputs (#1065)

[0.50.3] - 2026-01-29

Added

• Added Kimi For Coding provider support (Moonshot AI's Anthropic-compatible coding API)

[0.50.2] - 2026-01-29

Added

• Added Hugging Face provider support via OpenAI-compatible Inference Router (#994)
• Added PI_CACHE_RETENTION environment variable to control cache TTL for Anthropic (5m vs 1h) and OpenAI (in-memory vs 24h). Set to long for extended retention. Only applies to direct API calls (api.anthropic.com, api.openai.com). (#967)

Fixed

• Fixed OpenAI completions toolChoice handling to correctly set type: "function" wrapper (#998 by @williamtwomey)
• Fixed cross-provider handoff failing when switching from OpenAI Responses API providers (github-copilot, openai-codex) to other providers due to pipe-separated tool call IDs not being normalized, and trailing underscores in truncated IDs being rejected by OpenAI Codex (#1022)
• Fixed 429 rate limit errors incorrectly triggering auto-compaction instead of retry with backoff (#1038)
• Fixed Anthropic provider to handle sensitive stop_reason returned by API (#978)
• Fixed DeepSeek API compatibility by detecting deepseek.com URLs and disabling unsupported developer role (#1048)
• Fixed Anthropic provider to preserve input token counts when proxies omit them in message_delta events (#1045)

[0.50.1] - 2026-01-26

Fixed

• Fixed OpenCode Zen model generation to exclude deprecated models (#970 by @DanielTatarkin)

[0.50.0] - 2026-01-26

Added

• Added OpenRouter provider routing support for custom models via openRouterRouting compat field (#859 by @v01dpr1mr0s3)
• Added azure-openai-responses provider support for Azure OpenAI Responses API. (#890 by @markusylisiurunen)
• Added HTTP proxy environment variable support for API requests (#942 by @haoqixu)
• Added createAssistantMessageEventStream() factory function for use in extensions.
• Added resetApiProviders() to clear and re-register built-in API providers.

Changed

• Refactored API streaming dispatch to use an API registry with provider-owned streamSimple mapping.
• Moved environment API key resolution to env-api-keys.ts and re-exported it from the package entrypoint.
• Azure OpenAI Responses provider now uses base URL configuration with deployment-aware model mapping and no longer includes service tier handling.

Fixed

• Fixed Bun runtime detection for dynamic imports in browser-compatible modules (stream.ts, openai-codex-responses.ts, openai-codex.ts) (#922 by @dannote)
• Fixed streaming functions to use model.api instead of hardcoded API types
• Fixed Google providers to default tool call arguments to an empty object when omitted
• Fixed OpenAI Responses streaming to handle arguments.done events on OpenAI-compatible endpoints (#917 by @williballenthin)
• Fixed OpenAI Codex Responses tool strictness handling after the shared responses refactor
• Fixed Azure OpenAI Responses streaming to guard deltas before content parts and correct metadata and handoff gating
• Fixed OpenAI completions tool-result image batching after consecutive tool results (#902 by @terrorobe)

[0.49.3] - 2026-01-22

Added

• Added headers option to StreamOptions for custom HTTP headers in API requests. Supported by all providers except Amazon Bedrock (which uses AWS SDK auth). Headers are merged with provider defaults and model.headers, with options.headers taking precedence.
• Added originator option to loginOpenAICodex() for custom OAuth client identification
• Browser compatibility for pi-ai: replaced top-level Node.js imports with dynamic imports for browser environments (#873)

Fixed

• Fixed OpenAI Responses API 400 error "function_call without required reasoning item" when switching between models (same provider, different model). The fix omits the id field for function_calls from different models to avoid triggering OpenAI's reasoning/function_call pairing validation (#886)

[0.49.2] - 2026-01-19

Added

• Added AWS credential detection for ECS/Kubernetes environments: AWS_CONTAINER_CREDENTIALS_RELATIVE_URI, AWS_CONTAINER_CREDENTIALS_FULL_URI, AWS_WEB_IDENTITY_TOKEN_FILE (#848)

Fixed

• Fixed OpenAI Responses 400 error "reasoning without following item" by skipping errored/aborted assistant messages entirely in transform-messages.ts (#838)

Removed

• Removed strictResponsesPairing compat option (no longer needed after the transform-messages fix)

[0.49.1] - 2026-01-18

Added

• Added OpenAIResponsesCompat interface with strictResponsesPairing option for Azure OpenAI Responses API, which requires strict reasoning/message pairing in history replay (#768 by @prateekmedia)

Changed

• Split OpenAICompat into OpenAICompletionsCompat and OpenAIResponsesCompat for type-safe API-specific compat settings

Fixed

• Fixed tool call ID normalization for cross-provider handoffs (e.g., Codex to Antigravity Claude) (#821)

[0.49.0] - 2026-01-17

Changed

• OpenAI Codex responses now use the context system prompt directly in the instructions field.

Fixed

• Fixed orphaned tool results after errored assistant messages causing Codex API errors. When an assistant message has stopReason: "error", its tool calls are now excluded from pending tool tracking, preventing synthetic tool results from being generated for calls that will be dropped by provider-specific converters. (#812)
• Fixed Bedrock Claude max_tokens handling to always exceed thinking budget tokens, preventing compaction failures. (#797 by @pjtf93)
• Fixed Claude Code tool name normalization to match the Claude Code tool list case-insensitively and remove invalid mappings.

[0.48.0] - 2026-01-16

Fixed

• Fixed OpenAI-compatible provider feature detection to use model.provider in addition to URL, allowing custom base URLs (e.g., proxies) to work correctly with provider-specific settings (#774)
• Fixed Gemini 3 context loss when switching from providers without thought signatures: unsigned tool calls are now converted to text with anti-mimicry notes instead of being skipped
• Fixed string numbers in tool arguments not being coerced to numbers during validation (#786 by @dannote)
• Fixed Bedrock tool call IDs to use only alphanumeric characters, avoiding API errors from invalid characters (#781 by @pjtf93)
• Fixed empty error assistant messages (from 429/500 errors) breaking the tool_use to tool_result chain by filtering them in transformMessages

[0.47.0] - 2026-01-16

Fixed

• Fixed OpenCode provider's /v1 endpoint to use system role instead of developer role, fixing 400 Incorrect role information error for models using openai-completions API (#755 by @melihmucuk)
• Added retry logic to OpenAI Codex provider for transient errors (429, 5xx, connection failures). Uses exponential backoff with up to 3 retries. (#733)

[0.46.0] - 2026-01-15

Added

• Added MiniMax China (minimax-cn) provider support (#725 by @tallshort)
• Added gpt-5.2-codex models for GitHub Copilot and OpenCode Zen providers (#734 by @aadishv)

Fixed

• Avoid unsigned Gemini 3 tool calls (#741 by @roshanasingh4)
• Fixed signature support for non-Anthropic models in Amazon Bedrock provider (#727 by @unexge)

[0.45.7] - 2026-01-13

Fixed

• Fixed OpenAI Responses timeout option handling (#706 by @markusylisiurunen)
• Fixed Bedrock tool call conversion to apply message transforms (#707 by @pjtf93)

[0.45.6] - 2026-01-13

Fixed

• Export parseStreamingJson from main package for tsx dev mode compatibility

[0.45.5] - 2026-01-13

[0.45.4] - 2026-01-13

Added

• Added Vercel AI Gateway provider with model discovery and AI_GATEWAY_API_KEY env support (#689 by @timolins)

Fixed

• Fixed z.ai thinking/reasoning: z.ai uses thinking: { type: "enabled" } instead of OpenAI's reasoning_effort. Added thinkingFormat compat flag to handle this. (#688)

[0.45.3] - 2026-01-13

[0.45.2] - 2026-01-13

[0.45.1] - 2026-01-13

[0.45.0] - 2026-01-13

Added

• MiniMax provider support with M2 and M2.1 models via Anthropic-compatible API (#656 by @dannote)
• Add Amazon Bedrock provider with prompt caching for Claude models (experimental, tested with Anthropic Claude models only) (#494 by @unexge)
• Added serviceTier option for OpenAI Responses requests (#672 by @markusylisiurunen)
• Anthropic caching on OpenRouter: Interactions with Anthropic models via OpenRouter now set a 5-minute cache point using Anthropic-style cache_control breakpoints on the last assistant or user message. (#584 by @nathyong)
• Google Gemini CLI provider improvements: Added Antigravity endpoint fallback (tries daily sandbox then prod when baseUrl is unset), header-based retry delay parsing (Retry-After, x-ratelimit-reset, x-ratelimit-reset-after), stable sessionId derivation from first user message for cache affinity, empty SSE stream retry with backoff, and anthropic-beta header for Claude thinking models (#670 by @kim0)

[0.44.0] - 2026-01-12

[0.43.0] - 2026-01-11

Fixed

• Fixed Google provider thinking detection: isThinkingPart() now only checks thought === true, not thoughtSignature. Per Google docs, thoughtSignature is for context replay and can appear on any part type. Also removed id field from functionCall/functionResponse (rejected by Vertex AI and Cloud Code Assist), and added textSignature round-trip for multi-turn reasoning context. (#631 by @theBucky)

[0.42.5] - 2026-01-11

[0.42.4] - 2026-01-10

[0.42.3] - 2026-01-10

Changed

• OpenAI Codex: switched to bundled system prompt matching opencode, changed originator to "pi", simplified prompt handling

[0.42.2] - 2026-01-10

Added

• Added GOOGLE_APPLICATION_CREDENTIALS env var support for Vertex AI credential detection (standard for CI/production).
• Added supportsUsageInStreaming compatibility flag for OpenAI-compatible providers that reject stream_options: { include_usage: true }. Defaults to true. Set to false in model config for providers like gatewayz.ai. (#596 by @XesGaDeus)
• Improved Google model pricing info (#588 by @aadishv)

Fixed

• Fixed os.homedir() calls at module load time; now resolved lazily when needed.
• Fixed OpenAI Responses tool strict flag to use a boolean for LM Studio compatibility (#598 by @gnattu)
• Fixed Google Cloud Code Assist OAuth for paid subscriptions: properly handles long-running operations for project provisioning, supports GOOGLE_CLOUD_PROJECT / GOOGLE_CLOUD_PROJECT_ID env vars for paid tiers, and handles VPC-SC affected users (#582 by @cmf)

[0.42.1] - 2026-01-09

[0.42.0] - 2026-01-09

Added

• Added OpenCode Zen provider support with 26 models (Claude, GPT, Gemini, Grok, Kimi, GLM, Qwen, etc.). Set OPENCODE_API_KEY env var to use.

[0.41.0] - 2026-01-09

[0.40.1] - 2026-01-09

[0.40.0] - 2026-01-08

[0.39.1] - 2026-01-08

[0.39.0] - 2026-01-08

Fixed

• Fixed Gemini CLI abort handling: detect native AbortError in retry catch block, cancel SSE reader when abort signal fires (#568 by @tmustier)
• Fixed Antigravity provider 429 errors by aligning request payload with CLIProxyAPI v6.6.89: inject Antigravity system instruction with role: "user", set requestType: "agent", and use antigravity userAgent. Added bridge prompt to override Antigravity behavior (identity, paths, web dev guidelines) with Pi defaults. (#571 by @ben-vargas)
• Fixed thinking block handling for cross-model conversations: thinking blocks are now converted to plain text (no <thinking> tags) when switching models. Previously, <thinking> tags caused models to mimic the pattern and output literal tags. Also fixed empty thinking blocks causing API errors. (#561)

[0.38.0] - 2026-01-08

Added

• thinkingBudgets option in SimpleStreamOptions for customizing token budgets per thinking level on token-based providers (#529 by @melihmucuk)

Breaking Changes

• Removed OpenAI Codex model aliases (gpt-5, gpt-5-mini, gpt-5-nano, codex-mini-latest, gpt-5-codex, gpt-5.1-codex, gpt-5.1-chat-latest). Use canonical model IDs: gpt-5.1, gpt-5.1-codex-max, gpt-5.1-codex-mini, gpt-5.2, gpt-5.2-codex. (#536 by @ghoulr)

Fixed

• Fixed OpenAI Codex context window from 400,000 to 272,000 tokens to match Codex CLI defaults and prevent 400 errors. (#536 by @ghoulr)
• Fixed Codex SSE error events to surface message, code, and status. (#551 by @tmustier)
• Fixed context overflow detection for context_length_exceeded error codes.

[0.37.8] - 2026-01-07

[0.37.7] - 2026-01-07

[0.37.6] - 2026-01-06

Added

• Exported OpenAI Codex utilities: CacheMetadata, getCodexInstructions, getModelFamily, ModelFamily, buildCodexPiBridge, buildCodexSystemPrompt, CodexSystemPrompt (#510 by @mitsuhiko)

[0.37.5] - 2026-01-06

[0.37.4] - 2026-01-06

[0.37.3] - 2026-01-06

Added

• sessionId option in StreamOptions for providers that support session-based caching. OpenAI Codex provider uses this to set prompt_cache_key and routing headers.

[0.37.2] - 2026-01-05

Fixed

• Codex provider now always includes reasoning.encrypted_content even when custom include options are passed (#484 by @kim0)

[0.37.1] - 2026-01-05

[0.37.0] - 2026-01-05

Breaking Changes

• OpenAI Codex models no longer have per-thinking-level variants (e.g., gpt-5.2-codex-high). Use the base model ID and set thinking level separately. The Codex provider clamps reasoning effort to what each model supports internally. (initial implementation by @ben-vargas in #472)

Added

• Headless OAuth support for all callback-server providers (Google Gemini CLI, Antigravity, OpenAI Codex): paste redirect URL when browser callback is unreachable (#428 by @ben-vargas, #468 by @crcatala)
• Cancellable GitHub Copilot device code polling via AbortSignal

Fixed

• Codex requests now omit the reasoning field entirely when thinking is off, letting the backend use its default instead of forcing a value. (#472)

[0.36.0] - 2026-01-05

Added

• OpenAI Codex OAuth provider with Responses API streaming support: openai-codex-responses streaming provider with SSE parsing, tool-call handling, usage/cost tracking, and PKCE OAuth flow (#451 by @kim0)

Fixed

• Vertex AI dummy value for getEnvApiKey(): Returns "<authenticated>" when Application Default Credentials are configured (~/.config/gcloud/application_default_credentials.json exists) and both GOOGLE_CLOUD_PROJECT (or GCLOUD_PROJECT) and GOOGLE_CLOUD_LOCATION are set. This allows streamSimple() to work with Vertex AI without explicit apiKey option. The ADC credentials file existence check is cached per-process to avoid repeated filesystem access.

[0.35.0] - 2026-01-05

[0.34.2] - 2026-01-04

[0.34.1] - 2026-01-04

[0.34.0] - 2026-01-04

[0.33.0] - 2026-01-04

[0.32.3] - 2026-01-03

Fixed

• Google Vertex AI models no longer appear in available models list without explicit authentication. Previously, getEnvApiKey() returned a dummy value for google-vertex, causing models to show up even when Google Cloud ADC was not configured.

[0.32.2] - 2026-01-03

[0.32.1] - 2026-01-03

[0.32.0] - 2026-01-03

Added

• Vertex AI provider with ADC (Application Default Credentials) support. Authenticate with gcloud auth application-default login, set GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION, and access Gemini models via Vertex AI. (#300 by @default-anton)

Fixed

• Gemini CLI rate limit handling: Added automatic retry with server-provided delay for 429 errors. Parses delay from error messages like "Your quota will reset after 39s" and waits accordingly. Falls back to exponential backoff for other transient errors. (#370)

[0.31.1] - 2026-01-02

[0.31.0] - 2026-01-02

Breaking Changes

• Agent API moved: All agent functionality (agentLoop, agentLoopContinue, AgentContext, AgentEvent, AgentTool, AgentToolResult, etc.) has moved to @mariozechner/pi-agent-core. Import from that package instead of @mariozechner/pi-ai.

Added

• GoogleThinkingLevel type: Exported type that mirrors Google's ThinkingLevel enum values ("THINKING_LEVEL_UNSPECIFIED" | "MINIMAL" | "LOW" | "MEDIUM" | "HIGH"). Allows configuring Gemini thinking levels without importing from @google/genai.
• ANTHROPIC_OAUTH_TOKEN env var: Now checked before ANTHROPIC_API_KEY in getEnvApiKey(), allowing OAuth tokens to take precedence.
• event-stream.js export: AssistantMessageEventStream utility now exported from package index.

Changed

• OAuth uses Web Crypto API: PKCE generation and OAuth flows now use Web Crypto API (crypto.subtle) instead of Node.js crypto module. This improves browser compatibility while still working in Node.js 20+.
• Deterministic model generation: generate-models.ts now sorts providers and models alphabetically for consistent output across runs. (#332 by @mrexodia)

Fixed

• OpenAI completions empty content blocks: Empty text or thinking blocks in assistant messages are now filtered out before sending to the OpenAI completions API, preventing validation errors. (#344 by @default-anton)
• Thinking token duplication: Fixed thinking content duplication with chutes.ai provider. The provider was returning thinking content in both reasoning_content and reasoning fields, causing each chunk to be processed twice. Now only the first non-empty reasoning field is used.
• zAi provider API mapping: Fixed zAi models to use openai-completions API with correct base URL (https://api.z.ai/api/coding/paas/v4) instead of incorrect Anthropic API mapping. (#344, #358 by @default-anton)

[0.28.0] - 2025-12-25

Breaking Changes

• OAuth storage removed (#296): All storage functions (loadOAuthCredentials, saveOAuthCredentials, setOAuthStorage, etc.) removed. Callers are responsible for storing credentials.
• OAuth login functions: loginAnthropic, loginGitHubCopilot, loginGeminiCli, loginAntigravity now return OAuthCredentials instead of saving to disk.
• refreshOAuthToken: Now takes (provider, credentials) and returns new OAuthCredentials instead of saving.
• getOAuthApiKey: Now takes (provider, credentials) and returns { newCredentials, apiKey } or null.
• OAuthCredentials type: No longer includes type: "oauth" discriminator. Callers add discriminator when storing.
• setApiKey, resolveApiKey: Removed. Callers must manage their own API key storage/resolution.
• getApiKey: Renamed to getEnvApiKey. Only checks environment variables for known providers.

[0.27.7] - 2025-12-24

Fixed

• Thinking tag leakage: Fixed Claude mimicking literal </thinking> tags in responses. Unsigned thinking blocks (from aborted streams) are now converted to plain text without <thinking> tags. The TUI still displays them as thinking blocks. (#302 by @nicobailon)

[0.25.1] - 2025-12-21

Added

• xhigh thinking level support: Added supportsXhigh() function to check if a model supports xhigh reasoning level. Also clamps xhigh to high for OpenAI models that don't support it. (#236 by @theBucky)

Fixed

• Gemini multimodal tool results: Fixed images in tool results causing flaky/broken responses with Gemini models. For Gemini 3, images are now nested inside functionResponse.parts per the docs. For older models (which don't support multimodal function responses), images are sent in a separate user message.

• Queued message steering: When getQueuedMessages is provided, the agent loop now checks for queued user messages after each tool call and skips remaining tool calls in the current assistant message when a queued message arrives (emitting error tool results).

• Double API version path in Google provider URL: Fixed Gemini API calls returning 404 after baseUrl support was added. The SDK was appending its default apiVersion to baseUrl which already included the version path. (#251 by @shellfyred)

• Anthropic SDK retries disabled: Re-enabled SDK-level retries (default 2) for transient HTTP failures. (#252)

[0.23.5] - 2025-12-19

Added

• Gemini 3 Flash thinking support: Extended thinking level support for Gemini 3 Flash models (MINIMAL, LOW, MEDIUM, HIGH) to match Pro models' capabilities. (#212 by @markusylisiurunen)

• GitHub Copilot thinking models: Added thinking support for additional Copilot models (o3-mini, o1-mini, o1-preview). (#234 by @aadishv)

Fixed

• Gemini tool result format: Fixed tool result format for Gemini 3 Flash Preview which strictly requires { output: value } for success and { error: value } for errors. Previous format using { result, isError } was rejected by newer Gemini models. Also improved type safety by removing as any casts. (#213, #220)

• Google baseUrl configuration: Google provider now respects baseUrl configuration for custom endpoints or API proxies. (#216, #221 by @theBucky)

• GitHub Copilot vision requests: Added Copilot-Vision-Request header when sending images to GitHub Copilot models. (#222)

• GitHub Copilot X-Initiator header: Fixed X-Initiator logic to check last message role instead of any message in history. This ensures proper billing when users send follow-up messages. (#209)

[0.22.3] - 2025-12-16

Added

• Image limits test suite: Added comprehensive tests for provider-specific image limitations (max images, max size, max dimensions). Discovered actual limits: Anthropic (100 images, 5MB, 8000px), OpenAI (500 images, ≥25MB), Gemini (~2500 images, ≥40MB), Mistral (8 images, ~15MB), OpenRouter (~40 images context-limited, ~15MB). (#120)

• Tool result streaming: Added tool_execution_update event and optional onUpdate callback to AgentTool.execute() for streaming tool output during execution. Tools can now emit partial results (e.g., bash stdout) that are forwarded to subscribers. (#44)

• X-Initiator header for GitHub Copilot: Added X-Initiator header handling for GitHub Copilot provider to ensure correct call accounting (agent calls are not deducted from quota). Sets initiator based on last message role. (#200 by @kim0)

Changed

• Normalized tool_execution_end result: tool_execution_end event now always contains AgentToolResult (no longer AgentToolResult | string). Errors are wrapped in the standard result format.

Fixed

• Reasoning disabled by default: When reasoning option is not specified, thinking is now explicitly disabled for all providers. Previously, some providers like Gemini with "dynamic thinking" would use their default (thinking ON), causing unexpected token usage. This was the original intended behavior. (#180 by @markusylisiurunen)

[0.22.2] - 2025-12-15

Added

• Interleaved thinking for Anthropic: Added interleavedThinking option to AnthropicOptions. When enabled, Claude 4 models can think between tool calls and reason after receiving tool results. Enabled by default (no extra token cost, just unlocks the capability). Set interleavedThinking: false to disable.

[0.22.1] - 2025-12-15

Dedicated to Peter's shoulder (@steipete)

Added

• Interleaved thinking for Anthropic: Enabled interleaved thinking in the Anthropic provider, allowing Claude models to output thinking blocks interspersed with text responses.

[0.22.0] - 2025-12-15

Added

• GitHub Copilot provider: Added github-copilot as a known provider with models sourced from models.dev. Includes Claude, GPT, Gemini, Grok, and other models available through GitHub Copilot. (#191 by @cau1k)

Fixed

• GitHub Copilot gpt-5 models: Fixed API selection for gpt-5 models to use openai-responses instead of openai-completions (gpt-5 models are not accessible via completions endpoint)

• GitHub Copilot cross-model context handoff: Fixed context handoff failing when switching between GitHub Copilot models using different APIs (e.g., gpt-5 to claude-sonnet-4). Tool call IDs from OpenAI Responses API were incompatible with other models. (#198)

• Gemini 3 Pro thinking levels: Thinking level configuration now works correctly for Gemini 3 Pro models. Previously all levels mapped to -1 (minimal thinking). Now LOW/MEDIUM/HIGH properly control test-time computation. (#176 by @markusylisiurunen)

[0.18.2] - 2025-12-11

Changed

• Anthropic SDK retries disabled: Set maxRetries: 0 on Anthropic client to allow application-level retry handling. The SDK's built-in retries were interfering with coding-agent's retry logic. (#157)

[0.18.1] - 2025-12-10

Added

• Mistral provider: Added support for Mistral AI models via the OpenAI-compatible API. Includes automatic handling of Mistral-specific requirements (tool call ID format). Set MISTRAL_API_KEY environment variable to use.

Fixed

• Fixed Mistral 400 errors after aborted assistant messages by skipping empty assistant messages (no content, no tool calls) (#165)

• Removed synthetic assistant bridge message after tool results for Mistral (no longer required as of Dec 2025) (#165)

• Fixed bug where ANTHROPIC_API_KEY environment variable was deleted globally after first OAuth token usage, causing subsequent prompts to fail (#164)

[0.17.0] - 2025-12-09

Added

• agentLoopContinue function: Continue an agent loop from existing context without adding a new user message. Validates that the last message is user or toolResult. Useful for retry after context overflow or resuming from manually-added tool results.

Breaking Changes

• Removed provider-level tool argument validation. Validation now happens in agentLoop via executeToolCalls, allowing models to retry on validation errors. For manual tool execution, use validateToolCall(tools, toolCall) or validateToolArguments(tool, toolCall).

Added

• Added validateToolCall(tools, toolCall) helper that finds the tool by name and validates arguments.

• OpenAI compatibility overrides: Added compat field to Model for openai-completions API, allowing explicit configuration of provider quirks (supportsStore, supportsDeveloperRole, supportsReasoningEffort, maxTokensField). Falls back to URL-based detection if not set. Useful for LiteLLM, custom proxies, and other non-standard endpoints. (#133, thanks @fink-andreas for the initial idea and PR)

• xhigh reasoning level: Added xhigh to ReasoningEffort type for OpenAI codex-max models. For non-OpenAI providers (Anthropic, Google), xhigh is automatically mapped to high. (#143)

Changed

• Updated SDK versions: OpenAI SDK 5.21.0 → 6.10.0, Anthropic SDK 0.61.0 → 0.71.2, Google GenAI SDK 1.30.0 → 1.31.0

[0.13.0] - 2025-12-06

Breaking Changes

• Added totalTokens field to Usage type: All code that constructs Usage objects must now include the totalTokens field. This field represents the total tokens processed by the LLM (input + output + cache). For OpenAI and Google, this uses native API values (total_tokens, totalTokenCount). For Anthropic, it's computed as input + output + cacheRead + cacheWrite.

[0.12.10] - 2025-12-04

Added

• Added gpt-5.1-codex-max model support

Fixed

• OpenAI Token Counting: Fixed usage.input to exclude cached tokens for OpenAI providers. Previously, input included cached tokens, causing double-counting when calculating total context size via input + cacheRead. Now input represents non-cached input tokens across all providers, making input + output + cacheRead + cacheWrite the correct formula for total context size.

• Fixed Claude Opus 4.5 cache pricing (was 3x too expensive)

  • Corrected cache_read: $1.50 → $0.50 per MTok
  • Corrected cache_write: $18.75 → $6.25 per MTok
  • Added manual override in scripts/generate-models.ts until upstream fix is merged
  • Submitted PR to models.dev: https://github.com/sst/models.dev/pull/439

[0.9.4] - 2025-11-26

Initial release with multi-provider LLM support.