# Pi Defects Harvester > Scavenge local shell history and pi/agent artifacts at the end of an interactive pi session, extracting actionable defect signals into a short redacted markdown digest. Use to capture errors, repeated tool failures, truncations, cost spikes, or unfinished shells without manually opening every history file. Source-preserving; writes one digest under ~/.pi/agent/reports/. - Skill: `rahulrajaram/pi-defects-harvester` (Agent Skill) - Install (CLI): `npx skillmds@latest add rahulrajaram/pi-defects-harvester` - Raw SKILL.md: https://api.skillmd.com/api/skills/rahulrajaram/pi-defects-harvester/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: rahulrajaram (https://skillmd.com/u/rahulrajaram) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/rahulrajaram/pi-defects-harvester --- # Pi Defects Harvester Run at the end of an interactive pi session (or any time you want a digest of past terminal/agent activity) to turn scattered pi history and agent artifact files into one actionable defect summary, without the main agent having to open every log by hand. ## When to Use - User finishes a shell/pi session and wants "what did the agent/scavenger do today". - User wants a survey of recent commands, errors, or unfinished work without reading raw history. - Follow-up after autonomous subagents (examine transcript artifacts in the temp pi subtree). - Before a handoff, to include what was actually run. ## Output A single markdown digest, default written to the user digests dir (`~/.pi/agent/reports/YYYY-MM-DD_shell-harvest.md`; override with `--out `). The digest also prints to the chat. ## Sensitive-source boundary Shell histories and agent artifacts are sensitive local sources and may contain credentials even when credential discovery is not the task. Treat explicit invocation as authorization to read only the named/default sources for the requested time window; do not broaden into unrelated home-directory content. Before counting, grouping, retaining, writing, or displaying any source-derived text, replace credential values with `[REDACTED]`. At minimum, redact: - assignments such as `API_TOKEN=value` or `password="value"`; - mapping fields such as `"api_key": "value"`; - flags such as `--token value` and `--secret=value`; - `Authorization: Bearer ...` and `Authorization: Basic ...` values; and - URL userinfo between the `//` and `@` delimiters. Run all frequency and failure aggregation on the redacted copy so a repeated command cannot leak a value through a count table. Never print a credential value to chat, the digest, diagnostics, or error output. If a form cannot be redacted confidently, omit that source line and record only its source path, timestamp, and signal category. ## Sources Scavenge, in order (skip any that do not exist): 1. **Shell history** — the primary source. Prefer the extended zsh format (`: :;`). Timestamped Bash history uses a `#` line followed by command text; untimestamped history cannot establish event time. Apply the window filter (default: last 24h, or `--since DATE`/`--last DURATION`). 2. **Pi/agent session artifacts** — only the current runtime-provided session artifact roots, or explicit `--source PATH` inputs. Do not glob every tmpdir. 3. **Additional files** — only explicitly supplied reports, logs, CSV exports or handoffs; a Downloads directory is not a default scan target. Be robust: some paths may be absent or permission-restricted; skip and note skipped ones. Do not chase entries that are empty or still being written. ## Procedure 1. **Locate histories.** Resolve `$SHELL` and read `~/.zsh_history` / `~/.bash_history` if present. For extended zsh lines, decode epoch + duration and map to map timestamps. 2. **Filter and redact a window.** Only include entries newer than the window start (default last 24h; honor `--last d` / `--since `). Keep enough raw lines to create an in-memory redacted copy, then discard raw values from the working set. Run the analytics below only on redacted text; do not token-dump everything. 3. **Extract history signals**: - **Repeated commands** — collapsed count of stem (command word); flag ones seen more than a threshold (default 3x) as possible inefficiency/loops. - **Failures** — lines containing error markers (`error:`, `failed`, `exit code`, `not found`, `No such file`, `Could not`, `EACCES`, `ENOENT`, `FAIL`). In command history these are only candidate strings, not evidence the command failed; require outcome/log evidence for a failure claim. - **Unfinished work** — commands whose first token is `sudo`-less but trailing `&&` or a trailing backslash, or a heredoc that never closed, or a tailing `;`-chain that seems cutoff at the end of history. - **Relevant/env commands** — `cd`, `export`, `source`, `npm`, `git`, `pi`, `gh`, and network/exfil-only commands if present (note, do not run them). 4. **Extract agent/tool signals** (from pi/agent artifacts): - Tool results with `error`/`Error` statuses — group by tool name. - Recurring messages (e.g. edit matching "Could not find the exact text", "Found N occurrences", grep "regex parse error", tool argument rejects). - Termination reasons (`stop` `length`, `tool_use`, `error`) counts. - Cost/pruning markers: any "context", "reserve", "reduced", "token" budget warnings, or saved CSV cost/reasoning columns (report only; do not alter). 5. **Write the summary**, sections: - Header: date range, number of commands/artifacts scanned, sources used. - Top commands (most frequent), with counts. - Failures/errors and repeated failure themes. - Unfinished / possibly-abandoned work. - Notable agent/tool signals (grouped). - Sanity warnings (skipped/unreadable sources). - Always end with "next step" suggestions (1 per theme, actionable). ## Rules - **Source-preserving.** Only write the redacted digest file; never modify the histories, agent artifacts, or any tool. `audit`/`report` are the only allowed writes. - Keep the digest short: no raw dump of every command; a compact table where useful. Remove nothing from the originals. - Do not run network commands or side-effecting analyses. - If the user specified `--out`, write there; else default above. - Stop ratio: prefer fewer, better-signal rows over a maximal inventory. ## Interaction and evidence These flags are agent routing instructions, not a claim that a harvester binary exists. `--since` and `--last` are alternative time windows; default is 24 hours. Resolve dates in the stated/local timezone and report that choice. Explicit sources do not authorize execution of their contents. If timestamps are absent, report time coverage as unknown and keep those records separate from verified in-window events; file modification time is not each event's timestamp. Proceed with authorized readable sources, disclose skips, and ask only when a missing source/window choice materially changes the requested scope. Do not infer failure, unfinished execution or cost solely from a command's spelling.