PromptLens

Scan local AI-agent history, extract only user-authored messages, and render a PNG word cloud that supports both Chinese and English.

Quick Start

Run from the skill directory:

When invoked by an Agent, scan only that Agent's own history by default. Use the source matching the invoking harness, for example --sources codex for Codex, --sources claude for Claude Code, --sources opencode for OpenCode, --sources openclaw for OpenClaw, or --sources hermes for Hermes Agent.

uv run --with jieba --with wordcloud --with matplotlib --with pillow \
  scripts/promptlens.py \
  --sources codex \
  --days 90 \
  -o outputs/wordcloud.png \
  --report-json outputs/wordcloud.json

Use --path to add arbitrary JSONL/JSON files or directories:

uv run --with jieba --with wordcloud --with matplotlib --with pillow \
  scripts/promptlens.py \
  --path ~/.some-tool/history --sources custom \
  -o outputs/wordcloud.png

Filter by project and time range:

uv run --with jieba --with wordcloud --with matplotlib --with pillow \
  scripts/promptlens.py \
  --sources codex \
  --project SpotAsk --exclude-project worktrees \
  --since 2026-01-01 --until 2026-06-30 \
  -o outputs/wordcloud.png

Source Coverage

• codex: scans $CODEXHOME/sessions, $CODEXHOME/archived_sessions, and falls back to history.jsonl. Subagent threads are skipped.
• claude: scans $CLAUDECONFIGDIR/history.jsonl and direct CLI user messages in projects//.jsonl. Subagent, memory, tool-result, and SDK delegation records are skipped.
• opencode: reads the SQLite opencode.db under ~/.opencode, ~/.config/opencode, or OPENCODEDATADIR.
• openclaw: reads ~/.openclaw/agents/*/agent/openclaw-agent.sqlite and legacy session JSONL, or OPENCLAWSTATEDIR.
• hermes: reads ~/.hermes/state.db, or HERMES_HOME.
• custom: scans files/directories passed with --path, including raw OpenCode/OpenClaw/Hermes SQLite fixtures.

The scan is local-only and does not call any network service.

Output Modes

The default output is a promotional bordered image with the agent label, time range, message count, and session count. Add --plain to render only the cloud. Use --frame-label "My Agent" to override the label.

Weighting

The default scoring is conversation-relative and non-linear:

1. Clean the raw input by removing fenced code, inline code, URLs/paths, pasted-text markers, and slash commands.
2. Compute raw = 1 / (1 + (effective_length / 120) ** 1.5), so short inputs keep high weight and long inputs decay sharply.
3. Normalize raw weights within each conversation, then scale that conversation by sqrt(numberofuser_messages).
4. Multiply paste-heavy messages by 0.35.
5. Give each message a fixed term budget; words inside it share that budget by token share.

This stops long pasted code, error logs, and generated delegation prompts from dominating the cloud. See [references/scoring.md](references/scoring.md) for the formula, examples, and tuning knobs.

Useful Options

• --days N / --since YYYY-MM-DD: restrict the time range.
• --until YYYY-MM-DD (alias --to): set an upper time bound.
• --project SUBSTRING: keep only projects whose path contains the substring; repeatable.
• --exclude-project SUBSTRING: remove matching projects; repeatable.
• --list-projects: list discovered projects and message counts, then exit. It honors --project, --exclude-project, and time filters.
• --max-words N: control cloud density.
• --length-scale, --exponent, --paste-penalty: adjust the non-linear decay.
• --font PATH: use a specific CJK-capable font.
• --stopwords-file PATH: add user-specific stopwords, one per line.
• --report-json PATH: write a reproducible JSON report with scan stats and top terms.
• --verbose: print source counts and top terms.
• --plain: render only the word cloud, without the promotional border.
• --frame-label TEXT: override the agent label shown in the default border.