run-evals

This skill orchestrates the agent-eval suite: natural-language cases executed by a headless claude -p agent using the bundled skill (skills/sim-use/) against the Playground fixture apps, judged by deterministic post-condition checks. It verifies the layer the scripted E2E suites cannot: that an agent reading SKILL.md reaches for the right verbs and survives the documented pitfalls. A failure here with a green scripted layer usually means skill-prose drift, not a CLI bug.

Execution is delegated to scripts/eval.sh / e2e/agent-evals/run.py — do not reimplement their logic. Case anatomy, tags, and authoring rules live in e2e/agent-evals/README.md. Run from the repo root.

Step 1: Decide WHICH sim-use is under test

The whole run — device probing, the agent's commands, the verification layer — resolves sim-use from PATH unless overridden. Never let this be implicit:

Ask (or infer from the user's request) which binary to evaluate:
- Installed release (default): whatever sim-use resolves to on PATH.
- A development build: pass -b <path>, e.g. -b .build/out/Products/Debug/sim-use (SwiftBuild layout) or -b .build/debug/sim-use (classic). Build it first with make build.
Confirm the resolution and report it to the user before running:
```
python3 -c 'import pathlib,shutil; print(pathlib.Path(shutil.which("sim-use")).resolve())'
sim-use --version
```
The wrapper prints sim-use under test: <real path> (<version>) and the run report records it under sim-use under test: — quote that line back in your summary so the human knows exactly what was evaluated.

Step 2: Prepare devices and fixtures

For each platform you intend to cover (the wrapper auto-detects reachable ones; use -p ios|android to restrict):

iOS

Device Hub (Xcode 27) must be CLOSED — pgrep dtuhidd must be empty. A simulator booted while Device Hub is open has legacy HID disconnected; sim-use's guard will (correctly) fail every case on it. If dtuhidd is running: quit Device Hub, then shutdown && boot the simulator.
Boot a simulator and wait: xcrun simctl boot <UDID> && xcrun simctl bootstatus <UDID>.
The Playground fixture must be installed. Check: xcrun simctl listapps <UDID> | grep -c com.cameroncooke.SimUsePlayground — if missing, install with scripts/test-runner.sh -b (builds sim-use + Playground, ~2-3 min).

Android

Start an emulator (not on PATH by default: ~/Library/Android/sdk/emulator/emulator -avd <AVD> &), wait for adb shell getprop sys.boot_completed → 1.
Both fixture packages must be present: adb shell pm list packages | grep -c com.linecorp.simuse should be 2 (playground + device bridge). If missing, make e2e-android installs them.
A stale bridge from an older CLI version is fine — the version parity check fires and the agent is expected to recover via sim-use android init (that recovery is itself part of what the evals exercise).

Step 3: Run

make eval                                  # quick tag, every reachable platform, asks before spending
make eval ARGS="-y -t quick"               # skip the cost prompt (release-gate style)
make eval ARGS="-p ios -b .build/out/Products/Debug/sim-use"   # dev build, one platform
scripts/eval.sh -- --cases <id>            # a single case (raw run.py args)

Cost: each case is a real claude -p agent (~1-3 min, real API charge; the wrapper prints an estimate and asks unless -y). Never pass -y without the user having approved the spend in this conversation.

Step 4: Interpret and report

Reports land in e2e/agent-evals/reports/<timestamp>/ (gitignored): report.md (verdict table + env header), verdicts.jsonl, and one stream-json transcript per case.

All PASS → report the verdict table, the sim-use under test line, and the report path.
FAIL → read the case's transcript before concluding anything. Classify:
1. Skill-prose drift — the agent picked a wrong verb or missed a documented pitfall the skill should have steered around → fix skills/sim-use/SKILL.md, not the case.
2. CLI regression — the right verb failed → treat as a product bug; reproduce it directly with sim-use before filing.
3. Environment/fixture noise — reboot-settling, Playground missing, Device-Hub-poisoned boot → fix the environment and re-run; if the coupling is inherent, tag the case fragile (fragile-tagged cases never gate a run).
ERROR → the harness itself broke (reset failed, claude missing); fix the environment, don't touch cases.

Things to NOT do

Don't run evals without stating which binary is under test.
Don't pass -y unless the user already approved the cost.
Don't edit or delete eval cases to make a run green — a red case is signal; classify it first (Step 4).
Don't commit anything under e2e/agent-evals/reports/ (gitignored on purpose).