About agent-session-search
Agent Session Search is a skill for indexing and searching local coding-agent histories through the external CASS Rust CLI. It combines sessions from 13+ agents in one index and supports machine-readable search for agent workflows.
Key features
- 01Index histories from 13+ agents
- 02Lexical, semantic, and hybrid search
- 03JSON and robot-mode output
- 04View and expand matching sessions
- 05Watch files for index updates
Use cases
- 01Finding prior coding-agent discussions
- 02Searching sessions across agent tools
- 03Retrieving context around a search hit
Install
Copy the command and run it in a terminal.
npx skills add https:/After installing, type/agent-session-searchin Claude Code to confirm it loaded.
Bundled files
References and scripts installed along with SKILL.md.
references/command-reference.mdconfiguration.mderror-handling.mdinternals.mdquery-language.mdremote-sources.mdrobot-mode.mdsearch-and-ranking.mdtui-reference.mdDetails
From the project READMEAgent Session Search
Unified CLI/TUI to index and search local coding agent history. Aggregates sessions from 13+ agents into a single searchable index with sub-60ms latency. Purpose-built for AI agent consumption with robot mode and forgiving syntax. Not a library -- CASS is an external Rust CLI that must be installed separately.
Do not use for real-time session monitoring. Do not use when the agent has no local session history stored on disk.
Install via curl one-liner, Homebrew, or Scoop (see Configuration reference). Requires Rust nightly toolchain for building from source.
CRITICAL: NEVER run bare cass -- it launches an interactive TUI that blocks your session. Always use --robot or --json flags.
Essential Commands
| Command | Purpose |
|---|---|
cass health --json | Health check (exit 0 = healthy, non-zero = unhealthy) |
cass index --full | Full rebuild of DB and search index |
cass index | Incremental update since last scan |
cass index --watch | Watch mode: auto-reindex on file changes |
cass search "query" --robot | Search with JSON output |
cass search "query" --robot --fields minimal | Minimal payload (path, line, agent) |
cass search "query" --robot --limit 5 | Cap number of results |
cass search "query" --robot --mode hybrid | Use hybrid (lexical + semantic) search |
cass view /path -n 42 --json | View source at specific line |
cass expand /path -n 42 -C 5 --json | Context around a search result |
cass export-html /path | Export conversation as self-contained HTML |
cass robot-docs guide | LLM-optimized documentation |
cass robot-docs schemas | Response JSON schemas |
cass sources setup | Configure multi-machine remote sources |
Supported Agents
| Agent | Location | Format |
|---|---|---|
| Claude Code | ~/.claude/projects | JSONL |
| Codex | ~/.codex/sessions | Rollout JSONL |
| Gemini CLI | ~/.gemini/tmp | JSON |
| Cline | VS Code global storage | Task directories |
| OpenCode | .opencode directories | SQLite |
| Amp | ~/.local/share/amp + VS Code | Mixed |
| Cursor | ~/Library/Application Support/Cursor/User/ | SQLite state.vscdb |
| ChatGPT | ~/Library/Application Support/com.openai.chat | JSON (v1 unencrypted; v2/v3 encrypted) |
| Aider | ~/.aider.chat.history.md + per-project | Markdown |
| Pi-Agent | ~/.pi/agent/sessions | JSONL |
| Factory (Droid) | ~/.factory/sessions | JSONL |
| Clawdbot | ~/.clawdbot/sessions | JSONL |
| Vibe (Mistral) | ~/.vibe/logs/session/*/messages.jsonl | JSONL |
Search Modes
| Mode | Algorithm | Best For |
|---|---|---|
| lexical (default) | BM25 full-text via Tantivy | Exact term matching, code searches |
| semantic | Vector similarity (MiniLM via FastEmbed) | Conceptual queries, finding similar |
| hybrid | Reciprocal Rank Fusion (RRF) | Balanced precision and recall |
Semantic mode requires MiniLM model files. When unavailable, CASS falls back to a hash-based embedder for approximate similarity.
Forgiving Syntax
CASS auto-corrects common agent mistakes and emits teaching notes to stderr:
| Input | Correction |
|---|---|
| Typos in commands | Levenshtein-matched to canonical command |
Single-dash long flags (-robot) | Normalized to --robot |
Wrong case (--Robot) | Lowercased to --robot |
Common Mistakes
| Mistake | Fix |
|---|---|
Running bare cass | Always use --robot or --json |
Missing --robot flag | Add --robot for JSON output |
| No index exists | Run cass index --full first |
| Token budget overflow | Use --fields minimal and --limit |
| Stale search results | Run cass index to refresh |
| Parsing stderr as JSON | stdout = JSON only, diagnostics go to stderr |
| Assuming CASS is installed | Check cass health --json first |
Delegation
Use this skill for indexing, searching, and analyzing coding agent session history via CASS CLI. Delegates to the external cass binary for all operations. Run cass robot-docs guide for the authoritative command reference directly from the installed version.
For multi-machine session search, see Remote Sources. For TUI usage by human operators, see TUI Reference.
References
- Command Reference -- indexing, search, session viewing, export, and diagnostics
- Robot Mode -- self-documenting API, forgiving syntax, output formats, token budget
- Query Language -- boolean operators, wildcards, match types, time formats, auto-fuzzy fallback
- Search and Ranking -- search modes, ranking, scoring formula
- Remote Sources -- multi-machine search via SSH/rsync, setup wizard, path mappings
- TUI Reference -- keyboard shortcuts, themes, saved views, density modes, bookmarks
- Error Handling -- structured errors, exit codes, troubleshooting
- Internals -- response shapes, deduplication, performance, watch mode, semantic search
- Configuration -- environment variables, shell completions, installation, integrations