tessera-agents 0.4.1

Reflect on how you actually use AI coding agents. Reads your local Claude Code, Codex, and Gemini CLI traces, builds rich per-session narratives, and synthesizes cross-session patterns you can act on this week — with an interactive HTML dashboard.

tessera

Reflect on how you actually use AI coding agents.

Reads your local Claude Code, Codex, and Gemini CLI session traces, builds rich per-session narratives, then synthesizes cross-session patterns you can act on this week — surfaced as an interactive HTML dashboard you open in any browser. No API key, no server, no telemetry.

🔍 Live demo → (fictional data, click around to see what tessera produces — no install needed)

Adding another agent CLI is one parser function; the narrative + synthesis layers are agent-agnostic.

What you actually get

Run one command, open one HTML file. Two views:

Findings — the cross-session synthesis:

Headline: 40+ atella sessions each rediscover python=.venv/bin/python, git-root≠stella-backend/, PYTHONPATH=src — a single CLAUDE.md would eliminate 200+ wasted events/week

If you do one thing this week: printf '...' >> stella-backend/pyproject.toml AND create stella-backend/CLAUDE.md: …

§3 Missing git fetch before PR diff inflates scope 5-10x high · workflow · 8 sessions · ~46m friction · trend: stable In 6 sessions, diffing a PR against local main without first fetching showed 35-69 files instead of 6-14. Fix: prepend git fetch origin main && to the array-pr-review skill.

Week-over-week: 4 new · 2 continuing · 1 worsening · 3 resolved since last

Plus quick wins (one-line fixes you can copy with a button), per-project drilldowns, and inline [u]/[w]/[k]/[s] rating buttons that feed the next run's prompt.

Explore — browse all the data:

• Sessions table (sortable, filterable by agent / project / waste signature, click to drill into the full per-session narrative — tasks, friction with quotes, key decisions with retrospectives, dead ends, env issues, deterministic stats)
• All recurring environmental issues across all sessions, sorted by occurrence count
• All counterfactuals + lessons in three columns
• Per-project deep view

Every cited session is verifiable — citations use 4-char ref tokens (S001–S{n}) that map deterministically back to real session_ids. Fabrication rate by design: 0%.

The output is also written as synthesis.json (raw) and synthesis.md (shareable markdown).

How it works

~/.claude/projects/        ─┐
~/.codex/sessions/         ─┤    [1] normalize        [2] per-session             [3] cross-session       [4] dashboard
~/.gemini/tmp/             ─┴──▶ symlink into temp ─▶ narrative (1 LLM call ─▶ synthesis (1 LLM call ─▶ synthesis.html
                                  no copies, no       per session, cached by      on all narratives,         (Findings + Explore,
                                  source mods)        content hash)               ref-token citations)       inline rating)

Two LLM stages, both via your local claude CLI:

1. Per-session narrative — each session's compressed event stream (~30-50K tokens) gets one Sonnet 4.6 call producing structured narrative (goal, tasks, friction moments, key decisions, dead ends, recurring env issues, counterfactual). Cached by content hash; re-runs skip unchanged sessions.
2. Cross-session synthesis — all narratives compacted to high-signal fields (~150K tokens), one Sonnet 4.6 call producing observations + quick wins + per-project headlines. Validator drops any cited ref not in the input set.

See docs/schema/v1.md for the full per-session schema and docs/ARCHITECTURE.md for module-level flow.

Install

Requires Python 3.11+ and an authenticated claude CLI (version 2+). No ANTHROPIC_API_KEY — token usage routes through your existing Claude Code auth.

pip install tessera-agents
# or
uv tool install tessera-agents

The PyPI package is tessera-agents (the bare name tessera was taken). The CLI binary, slash command, and import are all just tessera.

Use

Weekly retrospective (the main flow)

tessera run                # last 30 days, ~5min cached / ~50min cold
open synthesis.html              # read findings, drill in, rate inline

After rating: click the floating SAVE button on the dashboard, paste the resulting one-liner in your terminal. Ratings feed the next run's synthesis prompt and the in-session coach (see below).

tessera run --all-time            # full history, no time filter
tessera run --lookback-days 60    # custom window
tessera run --min-events 5        # include shorter sessions (default 20)

In-session real-time nudges (sibling tool)

The tessera-live plugin watches your live sessions for known waste patterns (browser spirals, blind retries, runaway call rates, etc.) and nudges Claude with a short note when one appears. Silent on the happy path. Reads your dashboard ratings to enrich nudges with your validated playbook.

Power-user subcommands

tessera narrate              # per-session extraction only (no synthesis)
tessera synthesize           # synthesis only (reads existing narratives)
tessera synthesize --project atella   # filter to one project
tessera dashboard            # re-render the HTML from existing synthesis + narratives
tessera rate                 # interactive CLI rating (alternative to inline)
tessera rate-import < ratings.json  # apply ratings from dashboard
tessera eval                 # quality metrics (fabrication rate, etc.)

Slash command (inside Claude Code)

/tessera            # 30-day window
/tessera 60         # 60-day window
/tessera all-time   # everything

Common options

--lookback-days N         Window in days. Default 30. Use --all-time for no cap.
--min-events N            Skip sessions with fewer events. Default 20.
--limit N                 Cap to N most-recent sessions. 0 = no limit.
--model NAME              Claude model. Default claude-sonnet-4-6.
--concurrency N           Per-session extraction concurrency. Default 10.
--force                   Bypass narrative cache (still writes).
--output PATH             Where to write synthesis JSON. Default ./synthesis.json.
--narratives-dir DIR      Per-session JSON output dir. Default ./narratives.
--format text|json|markdown   Terminal output format. Default text.
--no-history              Don't read or save to history.
--prior-runs N            How many prior runs to feed back as context. Default 3.
--claude-projects DIR     Override Claude Code projects dir.
--codex-sessions DIR      Override Codex sessions dir.
--gemini-tmp DIR          Override Gemini CLI tmp dir.

Cost

Scenario	Sessions	Cost (Sonnet 4.6)	Wall clock
Weekly run, cache hits	50-100	~$1-3	5-10 min
Cold run on a new machine	50-100	~$5-12	30-50 min
Full historical backfill	1000-2000	~$15-30 (one-time)	4-6 hours
Re-synthesis only (no narrate)	any	~$0.50	5-15 min

All token usage routes through your claude CLI auth — no separate billing.

What it doesn't do

• Doesn't run continuously. Call it when you want a reflection.
• Doesn't score your work. No leaderboard, no "healthy %."
• Doesn't hallucinate evidence. Every cited ref maps to a real session; fabricated refs are dropped with a visible count in the dashboard's "Fabrications" stat.
• Doesn't classify with keywords. Task types and waste signatures come from LLM judgment grounded in event evidence, validated against a closed vocabulary.
• Doesn't send your data anywhere. Local read of trace files; LLM calls go through your existing auth; output stays on disk.

Privacy

Everything runs locally. Trace files are read from ~/.claude/projects/, ~/.codex/sessions/, and ~/.gemini/tmp/ (or wherever you've configured those agents). The two LLM calls (per-session narrative + cross-session synthesis) route through your existing authenticated claude CLI — no separate API key, no telemetry, no analytics. Cached narratives, synthesis output, and run history live under ~/.cache/tessera/ and ~/.config/tessera/.

The dashboard quotes verbatim text from your sessions — friction moments, error messages, decision rationale. Review before sharing screenshots or synthesis.md — they may contain code snippets, file paths, secrets you typed into prompts, or other content from your sessions.

Repo layout

tessera/
├── .claude-plugin/plugin.json     # Claude Code plugin manifest
├── commands/tessera.md            # /tessera slash command
├── docs/
│   ├── schema/v1.md               # per-session narrative schema spec
│   └── ARCHITECTURE.md            # module-level pipeline overview
├── pyproject.toml                 # publishes tessera to PyPI
├── src/tessera/
│   ├── cli.py                     # `tessera <command>` entry points
│   ├── pipeline.py                # symlink-based normalize orchestrator
│   ├── _normalize_script.py       # cross-agent event schema normalizer
│   ├── history.py                 # ratings + prior-run context store
│   ├── narratives/
│   │   ├── deterministic.py       # event-stream metadata extraction
│   │   ├── compressor.py          # event stream → compact narrative
│   │   ├── extractor.py           # per-session LLM call
│   │   ├── validator.py           # schema validation rules
│   │   ├── cache.py               # per-session content-hash cache
│   │   ├── pipeline.py            # per-session orchestrator
│   │   ├── synthesis.py           # cross-session LLM call + ref-citation validator
│   │   ├── render.py              # text + markdown renderers
│   │   ├── dashboard.py           # interactive HTML dashboard
│   │   └── eval.py                # quality metrics
│   └── coach/                     # in-session hook (separate plugin: ../tessera-live/)
├── tests/                         # pytest
├── CONTRIBUTING.md
├── LICENSE                        # MIT
└── README.md

One repo, three distribution paths. The Claude Code plugin and the pip package share the same source.

Contributing

See CONTRIBUTING.md. The most useful PR is probably a parser for a new agent CLI — drop a normalize_<agent>() function into _normalize_script.py matching the existing event schema, and the entire downstream pipeline (narratives, synthesis, dashboard) works on it for free.

License

MIT — see LICENSE.