[OrcaWin]

	Files	Added	Deleted	Net
Test	3	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​95	$\color{#cf222e}{\Huge{\mathbf{−}}}$​22	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​73
Prod	6	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​173	$\color{#cf222e}{\Huge{\mathbf{−}}}$​158	$\color{#1a7f37}{\Huge{\mathbf{+}}}$​15

ELI5

When Claude runs inside WSL on Windows, Orca's chat view has to find the session's history file inside the Linux distro. If the agent's hook never told Orca where that file is, Orca looked only in the Windows home folder, gave up, and showed "Transcript unavailable". Codex already had a fallback that also looks inside running distros. This gives Claude, Grok and omp the same fallback.

What Changed

• Before: Claude (and Grok and omp) inside WSL, with no hook transcript path: chat loads for a while, then shows "Transcript unavailable", while the terminal view works.
• After: the lookup searches this computer's own folders first and, only if the session is not there, the same agent's folders inside each running distro. It finds the file and chat loads.

Mechanism:

• wslCodexSessionsDirs becomes wslAgentSessionsDirs(agent). It builds each running distro's roots from the shared table added in the previous PR (AGENT_SESSION_HOME_SEGMENTS), so the WSL roots are the same ones Session History lists.
• findWslCodexSessionPath becomes findWslSessionPath(agent, …). It keeps the existing behavior: one shared tree walk per root for concurrent lookups, a refresh after a shared miss, and abort handling.
• A new SESSION_FILE_ID_LAYOUTS table says how each agent names a session's file (Claude <id>.jsonl, Codex rollout-…-<id>.jsonl, Grok <group>/<id>/chat_history.jsonl, omp <stamp>_<id>.jsonl with its subagent-folder prune). Host and WSL lookups both use it.
• The resolver's four per-agent lookups collapse into one resolveTiered: host roots in order (an earlier root still wins), then the WSL tier on a miss.

Unchanged guards: an SSH transcript path returns before any lookup. A WSL hook path, or an attested distro, still refuses an ID fallback. A caller-supplied root override gets no WSL tier, which keeps one account's transcript from resolving to another's.

Why

The fallback already existed and had been tuned for Codex: lazy, running distros only, gated reads so a stalled distro reads as "unavailable", not "missing". Reusing it for every agent is smaller and safer than writing three more. Picking the newest file across roots was rejected: it would break root priority (the config-dir-first rule and account isolation).

Linked Issue

Refs #13789. The unit test reproduces the hook-less path from that report, and this fixes it. The report predates main's WSL hook-path translation, so we will ask the reporter to confirm on a build with this change before closing.

Visual Proof

N/A: no UI change. The chat view now loads a transcript it used to fail to find.

Testing

• session-file-resolver-wsl.test.ts, new and failing on the base branch:

  • a Claude, omp or Grok transcript that exists only in a running distro resolves;
  • a distro that is not running is never searched.

• Guard: when a host Claude root has the session, WSL distros are never listed.

• Renamed wsl-session-path-scan.test.ts and host-readable-transcript-path.test.ts keep their existing coverage.

• pnpm test src/main/native-chat: 378 files pass. pnpm tc:node, oxlint and check:code-quality:changed pass.

• Not run on a real Windows/WSL machine.

• I manually tested these changes locally

• Automated tests added/updated, or explained why not below

Review

Agent skill upstream boundary

• Not applicable, or this change copies or mechanically translates no upstream skill-installer source, tests, fixtures, registry entries, path tables, comments, or documentation.

Notes

• Windows/WSL: the tier runs only on Windows, only after the host roots miss, and only for running distros, so it never boots a stopped distro.
• SSH: unchanged (orca-ssh-transcript: paths return first).
• macOS/Linux: the WSL tier returns no roots.
• Wire: none.

Builds on #27079 (merged).

Checklist

• This PR is small and focused
• I explained what changed and why (ELI5, the user-facing before/after, the mechanism, and why over the alternatives)
• Before/after screenshots or videos attached for UI changes, or N/A with reason
• Self-reviewed for correctness, security, and performance
• Cross-platform, SSH/remote, and path/shortcut impact considered (or N/A)
• pnpm lint, pnpm typecheck, pnpm test, and pnpm build pass (or CI will cover; local preferred)

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📥 Commits

Reviewing files that changed from the base of the PR and between 1726a10 and 95db2ef.

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📒 Files selected for processing (9)

• config/scripts/ci-shard-timings.json
• src/main/ai-vault/session-scanner-roots.ts
• src/main/native-chat/host-readable-transcript-path.test.ts
• src/main/native-chat/host-readable-transcript-path.ts
• src/main/native-chat/session-file-id-layouts.ts
• src/main/native-chat/session-file-resolver-wsl.test.ts
• src/main/native-chat/session-file-resolver.ts
• src/main/native-chat/wsl-session-path-scan.test.ts
• src/main/native-chat/wsl-session-path-scan.ts

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