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enhance(#3245): report the detected host runtime in init (#3307)

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* test(#3245): failing-first coverage for host runtime detection in init

Locks the behavior epic #2313 Phase 5 must produce before any of it exists: init reports the detected host, explicit GSD_RUNTIME and config runtime still outrank detection, non-Codex sessions are untouched, and nothing is ever written to shared defaults (#2297).

* enhance(#3245): report the detected host runtime in init

init reported agent_runtime: claude inside a Codex session, and resolved agents_dir to the Claude agents root with agents_installed: true — a spuriously healthy triple. Runtime identity was only ever read from GSD_RUNTIME or an explicit runtime in .planning/config.json.

Adds a detection rung beneath both explicit sources, in a new pure module. Codex is identified from its own documented session environment (CODEX_SANDBOX / CODEX_SANDBOX_NETWORK_DISABLED), else an explicitly exported CODEX_HOME whose config.toml exists. The default ~/.codex is never probed: that file exists on every machine that has run Codex, so probing it would misreport other runtimes' sessions.

resolveRuntime keeps its exact contract and all 71 dependents, including formatGsdSlash command-style emission; only withProjectRoot consumes the new rung. Nothing is written on any path (#2297). Explicit config still wins (#2517).

* fix(#3245): make the parity guard real and single-source the marker

Four independent review passes found the generative-fix-divergence guard was vacuous: it asserted agreement at the one input where inferPreferredRuntime and detectHostRuntime do not differ, so it could not fail. It now pins the actual divergence point (CODEX_HOME set, config.toml absent) and records that the asymmetry is deliberate.

The config.toml marker is now single-sourced from update-context.cts and imported, rather than carried independently by two surfaces. tests/helpers.cjs now scrubs CODEX_SANDBOX and CODEX_SANDBOX_NETWORK_DISABLED: GSD reads them, so an ambient Codex session would otherwise make the non-codex control test fail non-deterministically.

Also: detection is throw-safe end to end rather than only around the fs probe; the Windows-join test is replaced with one that can actually fail (trailing-separator, catches hand-rolled concatenation); the #2297 no-write proof now wraps resolveReportedRuntime, the function that ships, across all three ladder outcomes.

* chore(#3245): backfill changeset pr number

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Co-authored-by: sim <sim@local>
This commit is contained in:
Tom Boucher
2026-08-10 09:48:26 -04:00
committed by GitHub
parent 57437071e7
commit 96a82bbffb
16 changed files with 926 additions and 12 deletions
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docs/INVENTORY.md
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@@ -492,6 +492,7 @@ Full listing: `gsd-core/bin/lib/*.cjs`.
| `graphify-command-router.cjs` | ADR-959 capability command router for `gsd-tools graphify` — dispatches build/query/status/diff subcommands; first real capability command cutover (phase 4d-impl-2) |
| `gsd2-import.cjs` | External-plan ingest for `/gsd-import --from-gsd2` |
| `host-integration.cjs` | Host-Integration Interface (ADR-1239 Phase A) — negotiated capability contract over the six host-integration points; `negotiateHostCapabilities` fail-closes on undeclared/unknown/`undocumented` values, typed degradation ladder, host-capability profiles; the 8 `runtime.hostIntegration` axes are validated in `capability-validator.cjs` and sourced per-CLI in `docs/reference/host-integration-capability-matrix.md` |
| `host-runtime-detection.cjs` | Host Runtime Detection Module (ADR-2313 Phase 5, #3245) — the detection rung beneath `GSD_RUNTIME` and `.planning/config.json` `runtime` that lets `init` report `agent_runtime: codex` inside a Codex session instead of the hardcoded `claude` default; `detectHostRuntime` returns the typed `{runtime, source, signal}` from citation-backed Codex signals (`CODEX_SANDBOX`/`CODEX_SANDBOX_NETWORK_DISABLED`, else `CODEX_HOME` + `config.toml`), `resolveReportedRuntime` composes the full ladder. Pure, injectable, never writes, never shells out |
| `init-command-router.cjs` | Thin CJS subcommand router adapter for `gsd-tools init` |
| `init.cjs` | Compound context loading for each workflow type |
| `install-effort-resolver.cjs` | Install-time effort resolution — `readGsdEffectiveEffortConfig` (merges `~/.gsd/defaults.json` + project `.planning/config.json`) + `resolveInstallTimeEffort`, extracted from `bin/install.js` (#2071) so `gsd-tools effort sync` can require it from the shipped runtime instead of the never-copied package-root installer; install.js imports them back (single source) |