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fix-rollbar

Testing & Quality
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Fix a production exception from Rollbar in an interactive Claude Code session. Fetches the occurrence data, analyzes the error, and either implements a fix or adds the error to the ignore list. Use when given a Rollbar occurrence ID.

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Fix Rollbar Exception (Interactive)

Fix a production exception from Rollbar. The occurrence ID is: $ARGUMENTS

This is the interactive-session counterpart to aihelpers/rollbar/ (which runs the same flow headlessly in Docker). Unlike the headless variant, you fetch the Rollbar data yourself, and you stop after the fix is implemented — no worktree, no verification, no commit/push/PR. The user reviews and tests.

Prerequisites

ROLLBAR_READ_TOKEN must be set in the environment (used by both API calls and the get_exception.ts/user_events_markdown.ts/get_logs.ts scripts).

Steps

1. Fetch Rollbar / User Data

Stage the artifacts under .tmp/rollbar-$ARGUMENTS/. Skip any step gracefully if it fails — only rollbar.json is required to proceed.

install -d .tmp/rollbar-$ARGUMENTS

rollbar.json (required):

curl -sS -H "X-Rollbar-Access-Token: $ROLLBAR_READ_TOKEN" \
  "https://api.rollbar.com/api/1/instance/$ARGUMENTS" \
  -o .tmp/rollbar-$ARGUMENTS/rollbar.json

Extract item_id, liftosaur_exception_id, person.id, timestamp:

jq -r '.result.item_id, .result.data.liftosaur_exception_id, .result.data.person.id, .result.data.timestamp' \
  .tmp/rollbar-$ARGUMENTS/rollbar.json

item.json (using the item_id above):

curl -sS -H "X-Rollbar-Access-Token: $ROLLBAR_READ_TOKEN" \
  "https://api.rollbar.com/api/1/item/<ITEM_ID>" \
  -o .tmp/rollbar-$ARGUMENTS/item.json

exception.json (only if liftosaur_exception_id is non-null):

TS_NODE_TRANSPILE_ONLY=1 npx ts-node ./lambda/scripts/get_exception.ts <EXCEPTION_ID> \
  > .tmp/rollbar-$ARGUMENTS/exception.json

user_events.md (only if person.id is non-null):

TS_NODE_TRANSPILE_ONLY=1 npx ts-node ./lambda/scripts/user_events_markdown.ts <USER_ID> \
  > .tmp/rollbar-$ARGUMENTS/user_events.md

server_logs.txt (only if both timestamp and person.id are present). The script writes logs-<date>-<userid>.txt into the cwd, so run it from the tmp dir and rename:

DATE=$(node -e "console.log(new Date(<TIMESTAMP> * 1000).toISOString().slice(0,10))")
(cd .tmp/rollbar-$ARGUMENTS && TS_NODE_TRANSPILE_ONLY=1 npx ts-node ../../lambda/scripts/get_logs.ts $DATE <USER_ID>)
mv .tmp/rollbar-$ARGUMENTS/logs-$DATE-<USER_ID>.txt .tmp/rollbar-$ARGUMENTS/server_logs.txt 2>/dev/null || true

2. Parse Exception Data

If exception.json was fetched, parse the nested JSON to get lastState and lastActions:

jq -r '.data' .tmp/rollbar-$ARGUMENTS/exception.json | jq '.lastActions | fromjson' | tee .tmp/rollbar-$ARGUMENTS/lastActions.json | jq '.[-10:]'

jq -r '.data' .tmp/rollbar-$ARGUMENTS/exception.json | jq '.lastState | fromjson' | tee .tmp/rollbar-$ARGUMENTS/lastState.json | jq '{screenStack, progressCount: (.storage.progress | length)}'

The parsed data contains:

  • lastState — full IState (see src/models/state.ts:109), including storage, screenStack, and (possibly empty) progress
  • lastActions — recent Redux actions in reverse-chronological order (newest first)

3. Review User Events Timeline

If user_events.md was fetched, look for the error markers and their surrounding context:

grep -B 5 -A 5 "❌ \*\*ERROR\*\*" .tmp/rollbar-$ARGUMENTS/user_events.md || echo "No error markers found"

4. Review Server Logs (if available)

server_logs.txt can be large — don't read the whole file. Use the timestamp from rollbar.json to grep the surrounding window.

5. Fix or Ignore

Key files for reference:

  • src/types.ts — Core type definitions (IStorage, IProgram, IHistoryRecord, …)
  • src/models/state.ts — IState definition
  • src/ducks/reducer.ts — Redux reducer
  • src/ducks/thunks.ts — Async actions

Option A — add to ignore list when the error isn't worth fixing (browser-extension noise, unsupported browser, third-party script, generic unactionable message, transient already-handled network error, etc.). Append a unique substring of the message to exceptionIgnores in src/utils/rollbar.ts. Use the most specific part; don't ignore so broadly that legitimate errors get swept up.

Option B — fix the bug:

  1. Identify the root cause from the stack trace + state + actions
  2. Make the fix minimal and focused — handle the actual edge case, don't rewrite surrounding code
  3. Ensure the fix doesn't break other scenarios
  4. If the logic is non-trivial, add a unit test that reproduces the bug. Use nearby tests as a style reference.

Once the change is in place, stop and hand back to the user — they'll verify and commit.