Add debug logging to Slack cookie extraction pipeline

[devxoul]

Summary

• Cookie extraction has many silent failure paths that all return '' with no indication of what went wrong. Add an optional debugLog callback to TokenExtractor that logs at each decision point in the cookie pipeline.
• Wire the callback from auth extract --debug so users can see exactly where cookie extraction fails.

Changes

src/platforms/slack/token-extractor.ts

• Add optional debugLog callback parameter to constructor.
• Add debug() helper that calls the callback when set.
• Log at each failure point in extractCookieFromSQLite() and readCookieFromDB(): file not found, copy failure, no row, plaintext vs encrypted, decryption success/failure.
• Log Keychain key derivation status in getDerivedKeyAsync().

src/platforms/slack/commands/auth.ts

• Pass debugLog callback to TokenExtractor when --debug is set.

src/platforms/slack/token-extractor.test.ts

• Test that debugLog callback receives messages during extraction.
• Test that omitting debugLog does not throw.

Verified

• bun test — 264 pass, 0 fail (all Slack tests).
• bun typecheck — clean.
• bun lint — clean.

---

Summary by cubic

Add optional debug logging to the Slack cookie extraction pipeline so users can see why extraction fails. The auth extract command now forwards --debug to print step-by-step logs.

• New Features
  • TokenExtractor accepts an optional debugLog callback.
  • Logs key decision points: file/path selection, copy errors, no SQL rows, plaintext vs encrypted values, decryption success/failure, and SQL errors.
  • Reports Keychain key derivation status (cached, derived, failed, or skipped on non-darwin).
  • auth extract passes debugLog when --debug is set; tests cover logging and no-callback behavior.

^{Written for commit f5f5d66. Summary will update on new commits.}

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
agent-messenger	Ignored		Mar 5, 2026 0:37am

[cubic-dev-ai]

No issues found across 3 files