sentry-triage

name	sentry-triage
description	Triage Sentry crashes for an iOS release. Pulls unresolved fatal events from sentry.anytype.io, investigates each fingerprint cluster against the source, creates one Linear ticket per cluster with a root-cause hypothesis (no proposed fix - the implementer figures that out with full context), then archives the Sentry issue (status `ignored`) so it stops cluttering the inbox. Activate on "triage Sentry crashes", "triage fatal errors", "investigate crashes in release", "fatal errors in 0.X.Y", or any time the user wants to turn a release's Sentry inbox into actionable Linear tickets. The slash entry is `/do-sentry-triage`.
user-invocable	false

Sentry Triage

Purpose

Turn a release's unresolved Sentry crashes into actionable Linear tickets in one pass. The user ships a release, opens this skill, and gets back a list of Linear tickets - one per crash fingerprint - each carrying enough context (stack trace, suspect code, root-cause hypothesis from source reading, Sentry permalink, resolve footer) that picking up the fix is a single regular PR.

No proposed fix in the ticket. Triage is a fast survey across many clusters; the triager does not have enough implementation context to propose a fix that's actually right. Empirically the proposed-fix block in older versions of this skill was wrong nearly every time and biased the eventual implementer toward the wrong approach. The implementer reads the hypothesis + stack + source themselves and decides the fix with full context.

When to Use

• After a TestFlight or production release where Sentry shows fatal events
• When the user types /do-sentry-triage (with or without args)
• When the user says "triage crashes", "go through Sentry fatals", "what's broken in 0.X.Y"
• Any time the user wants a release's Sentry inbox turned into Linear work

Anytype iOS context (hardcoded constants)

The skill is project-scoped, so these don't need lookup at runtime:

• Sentry host: sentry.anytype.io (self-hosted)
• Organization slug: anytype
• Project slug: ios
• Linear team key: iOS
• Release name format:
  • Production: io.anytype.app@<version>+<build> (App Store)
  • Development: io.anytype.app.dev@<version>+<build> (TestFlight nightly)

Prerequisites (one-time)

1. Sentry auth token from https://sentry.anytype.io (User Settings -> Auth Tokens). Required scopes: org:read, project:read, project:releases, event:read, event:write.
2. MCP server wired at user scope:

   claude mcp add --scope user sentry -- npx -y @sentry/mcp-server@latest \
     --access-token=$SENTRY_TOKEN --host=sentry.anytype.io
   

   Verify with /mcp - sentry should be listed and connected.
3. linctl authenticated (linctl auth) - see .claude/skills/linear-developer/SKILL.md.

If the MCP isn't connected when the skill runs, stop and tell the user. The MCP tools we use are mcp__sentry__find_releases, mcp__sentry__list_issues, mcp__sentry__get_sentry_resource, mcp__sentry__update_issue.

Self-hosted Sentry quirks (these are not bugs - know them up front)

• Seer is unavailable: analyze_issue_with_seer returns 404 on sentry.anytype.io. Don't call it. The skill works fine on stack + source reading alone.
• ignoreMode='untilEscalating' resolves to "Forever": self-hosted maps the Sentry-Cloud-only ignore modes to Forever. The issue still leaves the unresolved inbox, which is the goal. The Fixes <shortId> commit footer still auto-resolves on next release.
• assignedTo field is not used in this org. Don't read it, don't filter on it, don't mention it in tickets.

Invocation

Form	Behavior
/do-sentry-triage	Latest production release in Sentry, fatal only
/do-sentry-triage 0.46.0	Specific version, production env, fatal only
/do-sentry-triage 0.46.0 development	Same version, development env (TestFlight)
/do-sentry-triage 0.46.0 --include-errors	Fatal + error level
/do-sentry-triage --include-errors	Latest production, fatal + error

Parse args off the user message. Default env is production. Default severity is level:fatal. --include-errors widens to level:[fatal,error].

Workflow

Step 1: Resolve the full release name

The full release name is what Sentry's release: query filter expects, e.g. io.anytype.app@0.46.1+6. Construct it:

• Env-based prefix:
  • production -> io.anytype.app@
  • development -> io.anytype.app.dev@
• If the user gave a version with a build (e.g. 0.46.1+6): concatenate <prefix><version>+<build> and use that.
• If the user gave only a version (0.46.1): call mcp__sentry__find_releases(organizationSlug='anytype', projectSlug='ios', query='<prefix><version>') and pick the highest +N build.
• If the user gave nothing: call mcp__sentry__find_releases(organizationSlug='anytype', projectSlug='ios') and pick the most recent release whose name starts with the env prefix.

If no matching release is found, stop and ask the user.

Step 2: Query unresolved crashes

mcp__sentry__list_issues(
  organizationSlug='anytype',
  projectSlugOrId='ios',
  query='is:unresolved level:fatal release:<FULL_RELEASE_NAME>',  # or level:[fatal,error]
  sort='freq',
  limit=20
)

Capture per cluster: shortId, permalink, title, culprit, level, firstSeen, lastSeen, count, userCount.

If empty, print No unresolved <severity> in <RELEASE> and exit.

If 20 come back, note "more may exist - re-run after handling these" in the final summary.

Step 3: Idempotency check (Linear-side)

Critical: Linear's team prefix is also IOS, so linctl issue search "IOS-93H" matches Linear's own ticket IOS-93H, not Sentry references. Search by Sentry permalink instead:

linctl issue search "issues/<shortId>" --json

Or use the full permalink. If a Linear ticket already references that permalink in its body, skip the cluster and record "already triaged" in the final summary.

Step 4: Investigate each remaining cluster

For each cluster:

1. Fetch full issue + latest event in one call: mcp__sentry__get_sentry_resource(url=<permalink>). This returns the issue metadata, the latest event, and the full stack trace in one response. Do not use list_issue_events - it returns summaries without stacks.

2. Classify by where the crash happened:

   • Swift / iOS-side: top frames in Anytype/Sources/ or Modules/. Proceed to read source.
   • Middleware / Go-side: stack is entirely github.com/anyproto/anytype-heart/.... Skip source-reading; the ticket exists to route to the middleware team.
   • Watchdog / no-stack: mechanism: watchdog_termination or Stacktrace: No stacktrace available. No specific code site; ticket describes the symptom only.
   • Symbolication failure: hex addresses instead of names. Note dSYM upload status, recommend re-upload.

3. For Swift-side clusters: read source at the top app frame's file:line (skip Pods/, system frameworks, <compiler-generated> - walk up to the first app frame). Read ~30 lines for context. Walk up the stack as needed to follow the call chain.

4. Form your hypothesis in one or two sentences. Be honest about uncertainty: "likely a force-unwrap when X is nil after Y" beats "the bug is on line 42".

Stop at the hypothesis. Do not write a proposed fix, a corrected snippet, or "the fix is to do X" guidance into the ticket. Triage is a fast survey; you don't have the implementation context to propose a fix that's actually correct, and a wrong proposal anchors the implementer toward the wrong approach (this was observed across ~15 fixes - the proposed-fix block was wrong nearly every time). The hypothesis + stack + source links are enough; the implementer reads them with full context and decides the fix themselves.

Step 5: Create the Linear ticket

linctl issue create --team iOS --title "<TITLE>" --description "<BODY>" --json

Do not pass --labels. The title prefix carries the categorization signal:

• Swift / iOS-side bug: [Sentry] <error_type> in <top_app_frame>
• Middleware / Go-side bug: [Sentry][Middleware] <error_type> in <go_path>

Capture the returned IOS-XXXX identifier and Linear URL from the JSON output (it can be long; pipe through jq -r '.identifier' to extract just the ID).

Body must follow the template in the next section verbatim - same headings, same order. Same structure across tickets is what makes the inbox scannable when there are five at once.

Step 6: Archive the Sentry issue

mcp__sentry__update_issue(
  organizationSlug='anytype',
  issueId=<shortId>,
  status='ignored',
  ignoreMode='untilEscalating'
)

On self-hosted this resolves to Forever (see Quirks); the issue still leaves the inbox, which is the goal.

If the update fails (network, permission), continue without it - the Linear ticket already exists. Log the failure for the final summary.

Step 7: Final summary

Print a markdown table to chat:

| Linear | Sentry | Title | Events / Users | Hypothesis |
|--------|--------|-------|----------------|------------|
| IOS-6178 | IOS-59D | Spreadsheet selectItem OOB section | 293 / 10 | re-selection uses pre-snapshot indexPaths; clamp to new section count |

Always include a final line summarizing skips: clusters already triaged (Linear hit in Step 3), Sentry status-update failures, and whether the 20-cluster cap was hit.

Linear ticket template

Title (no labels - title prefix is the only categorization):

• Swift / iOS-side: [Sentry] <error_type> in <top_app_frame>
• Middleware / Go-side: [Sentry][Middleware] <error_type> in <go_path>

Body for Swift / iOS-side bugs:

## Summary
<one or two sentence root-cause hypothesis - what likely went wrong, not how to fix it>

## Sentry data
- Issue: <permalink>
- Short ID: `<shortId>`
- First seen: <ISO timestamp>
- Last seen: <ISO timestamp>
- Affected release: <full release name>
- Environment: <production|development>
- Events: <count> / Users: <userCount>
- Top device: <device tag>
- Top OS: <os tag>

## Stack (app frames only)
\```
<top 5-10 frames inside Anytype/Sources or Modules, with file:line>
\```

---
: include  in the fix commit. Sentry CI auto-resolves on the next release containing the commit.

Body for middleware / Go-side bugs - prepend a Routing block:

## Routing
**This crash is in Go middleware (`anytype-heart` v<X.Y.Z>), not iOS Swift code.** Please route to the middleware team.

## Summary
<symptom + Go-side hypothesis - what likely went wrong, not how to fix it>

## Sentry data
... (same fields as Swift template)

## Stack (Go runtime)
\```
github.com/anyproto/anytype-heart/<...>:line
\```

---
**Resolve on merge**: middleware fix lands in `anytype-heart`, then iOS bumps the middleware version. Include `Fixes <shortId>` in the bump commit message.

Body for watchdog / stackless events:

## Summary
<symptom - OOM, hang, etc.>. No stack available; this is a profiling task, not a code-fix task. The implementer will need to instrument and reproduce to find the underlying pressure source.

## Sentry data
... (same fields)

## Stack
`No stacktrace available` - <mechanism> events don't capture call stacks.

---
**Resolve on merge**: include `Fixes <shortId>` in any commit that meaningfully reduces the underlying pressure (memory, main-thread blocking, etc.).

The Fixes <shortId> footer is load-bearing - the auto-resolve loop only works if the commit message contains it exactly. Use the Sentry short ID (e.g. IOS-93H), not the Linear ID.

Idempotency

Re-running the skill on the same release is safe:

1. Step 6 sets handled clusters to ignored, so the next run's is:unresolved query won't return them.
2. Step 3 cross-checks Linear by Sentry permalink before any expensive work. (Don't search by short ID - Linear's IOS- prefix collides with Sentry's.)

Edge cases

• Crash inside Go middleware: stack is entirely github.com/anyproto/anytype-heart/.... Use the [Sentry][Middleware] title prefix and the routing block. Don't read iOS source.
• WatchdogTermination / no stack: use the watchdog body template. Describe the symptom only - don't fabricate a fix or prescribe specific instrumentation steps.
• Symbolication failure: hex addresses instead of names. Mention dSYM upload status in the ticket.
• Same fingerprint, different versions: Sentry groups by fingerprint across releases. The release filter narrows to the current one, but firstSeen may predate it. Call that out so the user knows it's recurring, not a regression.
• Top frame in <compiler-generated>: Swift trap from Array._checkIndex, range, Optional.unsafelyUnwrapped. Walk up the stack to the first app frame; that's the call site.
• No fatal events found: print "No unresolved fatals in " and exit. Don't widen severity automatically; that's what --include-errors is for.
• Sentry MCP times out: stop, surface the error, suggest /mcp and checking the token.

What this skill does NOT do

• Write code or open PRs - only triage tickets
• Resolve Sentry issues - that happens automatically on the next release that contains a Fixes <shortId> commit, via the existing sentry-cli pipeline
• Run on a schedule - interactive only
• Triage warnings or non-crash events unless --include-errors is passed
• Use Linear labels - title prefix carries the categorization
• Read or filter on the Sentry assignedTo field - it's not used by this team

Related skills

• linear-developer - linctl command reference for ticket creation
• confidence-check - run before implementing the fix, not during triage
• ios-dev-guidelines - context when reading Swift source to form a hypothesis