docs(ado-script): document compiler-smoke-e2e harness in AGENTS.md and docs/ado-script.md

AGENTS.md

@@ -270,6 +270,7 @@ fail-closed and only pauses when the agent actually proposed a reviewed output.
 │           ├── executor-e2e/ # Stage 3 safe-output E2E test harness (not a bundle; runs deterministic scenarios against a real ADO project and files a GitHub issue on failure)
 │           ├── prepare-pr-base/ # create-pull-request preparer (bundled to prepare-pr-base.js): Agent mode uses ADO diff metadata + bounded dual-ref fallback to make the merge-base reachable; SafeOutputs mode fetches only the target worktree tip
 │           ├── trigger-e2e/ # Test-only gate-spec / trigger-evaluation harness (not a bundle): mirrors Rust `Fact::ALL` in `gate-spec.ts`; `fact-catalog.gen.json` is generated by `export-fact-catalog` and drift-guarded by CI
+│           ├── compiler-smoke-e2e/ # Test-only compiler-candidate smoke E2E orchestrator (not a bundle): stages the compiler under test as a `supply-chain.pipeline-artifact` source, pushes to a mirror branch, queues the registered candidate-lane pipelines, and asserts they all go green; built to `test-bin/` by `build:compiler-smoke-e2e`
 │           └── shared/   # Shared modules across bundles (auth, ado-client, env-facts, types.gen.ts)
 ├── tests/                # Integration tests and fixtures
 ├── docs/                 # Per-concept reference documentation (see index below)

docs/ado-script.md

@@ -112,6 +112,18 @@ pipeline** as runtime helpers. Today it produces thirteen bundles:
 > so the `gate-spec.test.ts` test can deep-compare `FACT_META` against the
 > Rust-side `Fact::ALL` registry, catching drift at CI time.
 
+> **Test-only, not shipped: `compiler-smoke-e2e`.** The workspace also contains a
+> `src/compiler-smoke-e2e/` harness that drives the deterministic compiler-candidate
+> smoke E2E suite. It stages the compiler binary produced by the current build (PR or
+> nightly `main`) as a pinned `supply-chain.pipeline-artifact` source across the five
+> real fixtures (canary, azure-cli, noop-target, janitor, smoke-failure-reporter),
+> pushes to a short-lived branch on the mirror repo, queues the registered
+> "candidate lane" pipeline definitions, and asserts they all go green. It is **not**
+> a runtime bundle: `npm run build:compiler-smoke-e2e` emits to the non-root
+> `test-bin/` directory so it is never packaged in the `ado-script/*.js` release glob.
+> It is listed in `NON_BUNDLE_DIRS` in `src/__tests__/bundle-coverage.test.ts` and the
+> compiler itself never references it.
+
 ## What `gate.js` does
 
 `gate.js` is a single-shot Node program that runs as a step in the
@@ -564,6 +576,7 @@ scripts/ado-script/
 │   │   ├── gate-spec.ts         # FACT_META mirror of Rust Fact::ALL; drift-guarded by export-fact-catalog + fact-catalog.gen.json
 │   │   ├── fact-catalog.gen.json # generated by `cargo run -- export-fact-catalog`; deep-compared by gate-spec.test.ts
 │   │   └── __tests__/           # gate-spec drift tests and trigger-evaluation scenario tests
+│   ├── compiler-smoke-e2e/      # test-only: compiler-candidate smoke E2E orchestrator (not a bundle; built to test-bin/compiler-smoke-e2e.js)
 │   └── executor-e2e/            # test-only: Stage 3 safe-output E2E harness (not a bundle; built to test-bin/executor-e2e.js)
 ├── test/                        # End-to-end smoke tests (gate, import, exec-context-pr)
 ├── gate.js                      # ncc bundle output (gitignored)