app-server: use permission ids and runtime workspace roots (#22611)

## Why

This PR builds on [#22610](https://github.com/openai/codex/pull/22610)
and is the app-server side of the migration from mutable per-turn
`SandboxPolicy` replacement toward selecting immutable permission
profiles by id plus mutable runtime workspace roots.

Once permission profiles can carry their own immutable
`workspace_roots`, app-server no longer needs to mutate the selected
`PermissionProfile` just to represent thread-specific filesystem
context. The mutable part now lives on the thread as explicit
`runtimeWorkspaceRoots`, while `:workspace_roots` remains symbolic until
the sandbox is realized for a turn.

## What Changed

- Replaced the v2 permission-selection wrapper surface with plain
profile ids for `thread/start`, `thread/resume`, `thread/fork`, and
`turn/start`.
- Removed the API surface for profile modifications
(`PermissionProfileSelectionParams`,
`PermissionProfileModificationParams`,
`ActivePermissionProfileModification`).
- Added experimental `runtimeWorkspaceRoots` fields to the thread
lifecycle and turn-start APIs.
- Threaded runtime workspace roots through core session/thread
snapshots, turn overrides, app-server request handling, and command
execution permission resolution.
- Kept session permission state symbolic so later runtime root updates
and cwd-only implicit-root retargeting rebind `:workspace_roots`
correctly.
- Updated the embedded clients just enough to send and restore the new
thread state.
- Refreshed the generated schema/TypeScript artifacts and the app-server
README to match the new contract.

## Verification

Targeted coverage for this layer lives in:

- `codex-rs/app-server-protocol/src/protocol/v2/tests.rs`
- `codex-rs/app-server/tests/suite/v2/thread_start.rs`
- `codex-rs/app-server/tests/suite/v2/thread_resume.rs`
- `codex-rs/app-server/tests/suite/v2/turn_start.rs`
- `codex-rs/core/src/session/tests.rs`

The key regression checks exercise that:

- `runtimeWorkspaceRoots` resolve against the effective cwd on thread
start.
- Profile-declared workspace roots are excluded from the runtime
workspace roots returned by app-server.
- A turn-level runtime workspace-root update persists onto the thread
and is returned by `thread/resume`.
- A named permission profile selected on one turn remains symbolic so a
later runtime-root-only turn update changes the actual sandbox writes.
- A cwd-only turn update retargets the implicit runtime cwd root while
preserving additional runtime roots.
- The protocol fixtures and generated client artifacts stay in sync with
the string-based permission selection contract.











---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/22611).
* #22612
* __->__ #22611
This commit is contained in:
Michael Bolin
2026-05-14 23:00:05 -07:00
committed by GitHub
Unverified
parent e6a7368810
commit 8a5306ff88
58 changed files with 1167 additions and 676 deletions
@@ -107,6 +107,11 @@ pub struct ThreadStartParams {
pub service_tier: Option<Option<String>>,
#[ts(optional = nullable)]
pub cwd: Option<String>,
/// Replace the thread's runtime workspace roots. Relative paths are
/// resolved against the effective cwd for the thread.
#[experimental("thread/start.runtimeWorkspaceRoots")]
#[ts(optional = nullable)]
pub runtime_workspace_roots: Option<Vec<PathBuf>>,
#[experimental(nested)]
#[ts(optional = nullable)]
pub approval_policy: Option<AskForApproval>,
@@ -116,10 +121,10 @@ pub struct ThreadStartParams {
pub approvals_reviewer: Option<ApprovalsReviewer>,
#[ts(optional = nullable)]
pub sandbox: Option<SandboxMode>,
/// Named profile selection for this thread. Cannot be combined with
/// `sandbox`. Use bounded `modifications` for supported turn/thread
/// adjustments instead of replacing the full permissions profile.
/// Named profile id for this thread. Cannot be combined with `sandbox`.
#[experimental("thread/start.permissions")]
#[schemars(with = "Option<String>")]
#[ts(type = "string | null")]
#[ts(optional = nullable)]
pub permissions: Option<PermissionProfileSelectionParams>,
#[ts(optional = nullable)]
@@ -195,6 +200,11 @@ pub struct ThreadStartResponse {
pub model_provider: String,
pub service_tier: Option<String>,
pub cwd: AbsolutePathBuf,
/// Thread-scoped runtime workspace roots used to materialize
/// `:workspace_roots`.
#[experimental("thread/start.runtimeWorkspaceRoots")]
#[serde(default)]
pub runtime_workspace_roots: Vec<AbsolutePathBuf>,
/// Instruction source files currently loaded for this thread.
#[serde(default)]
pub instruction_sources: Vec<AbsolutePathBuf>,
@@ -264,6 +274,11 @@ pub struct ThreadResumeParams {
pub service_tier: Option<Option<String>>,
#[ts(optional = nullable)]
pub cwd: Option<String>,
/// Replace the thread's runtime workspace roots. Relative paths are
/// resolved against the effective cwd for the thread.
#[experimental("thread/resume.runtimeWorkspaceRoots")]
#[ts(optional = nullable)]
pub runtime_workspace_roots: Option<Vec<PathBuf>>,
#[experimental(nested)]
#[ts(optional = nullable)]
pub approval_policy: Option<AskForApproval>,
@@ -273,10 +288,11 @@ pub struct ThreadResumeParams {
pub approvals_reviewer: Option<ApprovalsReviewer>,
#[ts(optional = nullable)]
pub sandbox: Option<SandboxMode>,
/// Named profile selection for the resumed thread. Cannot be combined
/// with `sandbox`. Use bounded `modifications` for supported thread
/// adjustments instead of replacing the full permissions profile.
/// Named profile id for the resumed thread. Cannot be combined with
/// `sandbox`.
#[experimental("thread/resume.permissions")]
#[schemars(with = "Option<String>")]
#[ts(type = "string | null")]
#[ts(optional = nullable)]
pub permissions: Option<PermissionProfileSelectionParams>,
#[ts(optional = nullable)]
@@ -310,6 +326,11 @@ pub struct ThreadResumeResponse {
pub model_provider: String,
pub service_tier: Option<String>,
pub cwd: AbsolutePathBuf,
/// Thread-scoped runtime workspace roots used to materialize
/// `:workspace_roots`.
#[experimental("thread/resume.runtimeWorkspaceRoots")]
#[serde(default)]
pub runtime_workspace_roots: Vec<AbsolutePathBuf>,
/// Instruction source files currently loaded for this thread.
#[serde(default)]
pub instruction_sources: Vec<AbsolutePathBuf>,
@@ -370,6 +391,11 @@ pub struct ThreadForkParams {
pub service_tier: Option<Option<String>>,
#[ts(optional = nullable)]
pub cwd: Option<String>,
/// Replace the thread's runtime workspace roots. Relative paths are
/// resolved against the effective cwd for the thread.
#[experimental("thread/fork.runtimeWorkspaceRoots")]
#[ts(optional = nullable)]
pub runtime_workspace_roots: Option<Vec<PathBuf>>,
#[experimental(nested)]
#[ts(optional = nullable)]
pub approval_policy: Option<AskForApproval>,
@@ -379,10 +405,11 @@ pub struct ThreadForkParams {
pub approvals_reviewer: Option<ApprovalsReviewer>,
#[ts(optional = nullable)]
pub sandbox: Option<SandboxMode>,
/// Named profile selection for the forked thread. Cannot be combined with
/// `sandbox`. Use bounded `modifications` for supported thread
/// adjustments instead of replacing the full permissions profile.
/// Named profile id for the forked thread. Cannot be combined with
/// `sandbox`.
#[experimental("thread/fork.permissions")]
#[schemars(with = "Option<String>")]
#[ts(type = "string | null")]
#[ts(optional = nullable)]
pub permissions: Option<PermissionProfileSelectionParams>,
#[ts(optional = nullable)]
@@ -419,6 +446,11 @@ pub struct ThreadForkResponse {
pub model_provider: String,
pub service_tier: Option<String>,
pub cwd: AbsolutePathBuf,
/// Thread-scoped runtime workspace roots used to materialize
/// `:workspace_roots`.
#[experimental("thread/fork.runtimeWorkspaceRoots")]
#[serde(default)]
pub runtime_workspace_roots: Vec<AbsolutePathBuf>,
/// Instruction source files currently loaded for this thread.
#[serde(default)]
pub instruction_sources: Vec<AbsolutePathBuf>,