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@tages/harness-claude-code

v0.1.0

Published

Claude Code hooks capture package for the Tages instrumented harness — reads hook JSON on stdin, redacts secrets, and appends to a local SQLite log.

Vulnerabilities

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Links

Git

Maintainers

ryantlee25ryantlee25

Keywords

claude-codehooksinstrumentationmcptages

Readme

@tages/harness-claude-code

Claude Code hooks capture package for the Tages instrumented harness — a second, local-first ingestion path that captures the full tool-call stream (Bash/Read/Edit/Grep/MCP/etc.) a Claude Code agent actually takes, not just the calls that happen to be Tages MCP tools.

This package is not installed directly by developers. It's installed and managed by tages harness enable / disable / status / sync (see @tages/cli), which writes a hooks block into your own gitignored .claude/settings.local.json pointing at this package's bin.

What it does

  1. Claude Code invokes tages-harness-claude-code once per PreToolUse / PostToolUse / SessionEnd / Stop hook firing, piping a JSON payload on stdin.
  2. This process normalizes the payload into a HarnessEvent (@tages/shared).
  3. Every arg/path/result field is redacted via redactSensitiveData (@tages/shared) before anything touches disk, and capped in length — v1 never stores uncapped file contents or full diffs, only tool name, scrubbed args/paths, exit codes, durations, and timestamps.
  4. The event is appended to a local SQLite log at ~/.config/tages/cache/<slug>-harness.db.
  5. The process exits 0. It never throws, never blocks the agent's tool call, and never emits blocking stdout — a malformed or unrecognized payload just means nothing was captured this time.

tages harness sync (in @tages/cli) later batches unsynced rows from that local log into a harness_tool_events Supabase table.

Privacy

Raw, unredacted payloads never leave the machine and are never written even to the local log — redaction happens in-process, before the first disk write. See PRIVACY.md's instrumented-harness section for the full data-handling commitment (what's captured, what's redacted, retention).

Files

  • src/index.ts — hook bin entrypoint; parseHookPayload (the payload adapter) and handleRawPayload (parse + redact + persist) are exported for testing.
  • src/local-log.ts — local SQLite log (HarnessLog), mirrors packages/server/src/cache/query-log.ts's minimal better-sqlite3 + WAL pattern.

Related packages

  • @tages/shared — HarnessEvent type, redactSensitiveData
  • @tages/cli — tages harness enable/disable/status/sync
  • @tages/server — the MCP server this harness is additive to, not a replacement for

License

MIT.