pakrym-oai b6d6be2a84 [codex] prototype mcp_history thread hint injection (#29259) ...

## Why

Prototype whether the harness can invoke the `mcp_history` MCP while
constructing full initial context and expose its thread hint to the
model without requiring a model-issued tool call.

The prototype builds on the context-window lineage added by #29256 and
is now based directly on `main`.

## What changed

- Call `mcp_history/thread_hint` with no arguments while building the
full `<token_budget>` context.
- Pass the current `threadId` through MCP request metadata, matching the
normal MCP tool-call path.
- Serialize only the unstructured `content` result and append it inside
`<token_budget>` when the call succeeds.
- Omit the additional context when the MCP call or content serialization
fails.

## Prototype limitations

- The direct call bypasses the normal model-initiated MCP approval,
lifecycle-event, telemetry, and result-sanitization path.
- The call has no prototype-specific timeout, result-size cap, or
per-window cache.
- MCP latency is added to full-context construction, including
applicable compaction paths.

## Validation

- `just test -p codex-core token_budget`

b6d6be2a84 · 2026-06-20 18:02:02 -07:00

History

..

src

[codex] prototype mcp_history thread hint injection (#29259)

2026-06-20 18:02:02 -07:00

tests

feat: use encrypted local secrets for MCP OAuth (#27541)

2026-06-12 22:03:51 +00:00

BUILD.bazel

[3/4] Add executor-backed RMCP HTTP client (#18583)

2026-04-22 17:38:04 -07:00

Cargo.toml

[codex] Carry exec-server cwd as PathUri (#28032)

2026-06-13 20:56:42 +00:00