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name: ios-fix preamble-tier: 2 version: 1.0.0 description: | Autonomous iOS bug fixer. Takes a bug found by /ios-qa, reads the source, writes the fix, rebuilds, redeploys, and verifies the fix on the real device. Closes the loop: find bug → fix bug → confirm fix — zero human intervention. Captures the pre-bug state snapshot as a regression test fixture, so the bug can never recur silently. Use when /ios-qa reports a bug and you want it fixed automatically, or when asked to "fix this iOS bug", "patch the iPhone app", or "auto-fix the iOS issue". (gstack) voice-triggers:

• "fix the iOS bug"
• "patch the iPhone app"
• "auto-fix the iOS issue" allowed-tools:
• Bash
• Read
• Write
• Edit
• Grep
• Glob
• AskUserQuestion triggers:
• fix this ios bug
• patch the iphone app
• auto-fix the ios issue

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{{PREAMBLE}}

Autonomous iOS bug fixer

Iron Law

NO FIX WITHOUT A REPRODUCING SNAPSHOT. Before editing any Swift source, the agent MUST capture a GET /state/snapshot that reproduces the bug. That snapshot becomes a regression test fixture (test/fixtures/ios-fix/). A fix that lands without a reproducing snapshot is a fix you'll be re-fixing in three months.

Phase 1: Reproduce the bug

1. Read the /ios-qa finding (bug description, screenshot, suspected accessibility-tree node).
2. Bring the device into the bug state via POST /tap, /swipe, /type, or POST /state/<key> (snapshot-eligible fields only).
3. Capture GET /state/snapshot → write to test/fixtures/ios-fix/<bug-slug>-pre.json.
4. Capture GET /screenshot → write to test/fixtures/ios-fix/<bug-slug>-pre.png.
5. Persist a one-line description of what's wrong + expected behavior.

Phase 2: Locate root cause

Per /investigate's Iron Law: no fix without root cause. The agent reads the Swift source, traces from the buggy screen back to the view model, the data flow, and the state mutation. Identify the smallest change that fixes the behavior.

Use AskUserQuestion if there are multiple plausible root causes — let the user pick the one to fix.

Phase 3: Apply fix

1. Edit Swift source. Keep the diff minimal.
2. Rebuild: xcodebuild -scheme <SchemeName> -destination 'platform=iOS,id=<UDID>' build install.
3. Daemon detects the rebuild and reconnects the StateServer tunnel.
4. Re-deploy. The same boot-token rotation flow runs.

Phase 4: Verify

1. POST /state/restore with the pre-bug snapshot → reproduces the state.
2. Take a fresh screenshot. Compare against test/fixtures/ios-fix/<bug-slug>-pre.png.
3. If the bug visibly persists, the fix didn't work — revert and try again (max 3 iterations before escalating to the user).
4. If the bug is gone, capture <bug-slug>-post.png for the regression test.

Phase 5: Add regression test

Write a test in test/fixtures/ios-fix/<bug-slug>.test.ts that:

1. Loads the pre-bug snapshot.
2. Restores it via POST /state/restore.
3. Asserts the post-fix behavior on a real device (gated GSTACK_HAS_IOS_DEVICE=1, periodic tier).

Commit the snapshot fixture + test file alongside the fix.

Failure modes

| Symptom | Action | |---|---| | 3 iterations, bug still present | STOP, report to user with current best hypothesis | | 409 schema_mismatch on /state/restore after rebuild | Re-codegen accessors (swift run gen-accessors), re-snapshot | | Device disconnects mid-fix | Daemon auto-reconnects; resume from Phase 4 | | Build fails | Revert Swift edits; investigate compile error before re-applying fix |