Is the Session Index skill free?

Yes. The skill itself is free from lee-fuhr/claude-session-index. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Session Index SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Session Index?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Session Index with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Session Index

Full-text search, analytics and synthesis across all your past Claude Code sessions

by lee-fuhr · lee-fuhr/claude-session-index

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 20, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 30, 2026 · 68c5278

⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 20, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.

Ran it live against a real machine: first command auto-indexed 1126 sessions with zero errors, then FTS search for 'skill test protocol' returned five ranked sessions with dates, projects, exchange counts, durations, matching excerpts and copy-paste claude --resume links. 'analytics --week' broke 275 sessions down by project with total hours; a no-skill baseline would be reduced to manually grepping raw ~/.claude/projects jsonl with no ranking, resume links or time rollups. Docs claims (SQLite+FTS5, first-run auto-index, resume links) all matched exactly; only the cross-session synthesis feature was left unmeasured because it needs an ANTHROPIC_API_KEY, but every search/recent/analytics path worked.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Session Index does

Builds a local SQLite FTS5 index over every Claude Code session so you can ask 'what did I try last time?', find old conversations, or get per-project time analytics with claude --resume links back to each source session. Triggers when the user asks about past sessions, previous conversations, or how much time they spent on something.

How to install Session Index

Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.

Commands — how to trigger Session Index

/session-index Full-text search, analytics and synthesis across all your past Claude Code sessions

It also activates on plain-language prompts like these:

What did I try last time I worked on this authentication bug?
Search all my past Claude Code sessions for that database migration
How much time did I spend on this project across all past sessions?

Frequently asked questions

Is the Session Index skill free?: Yes. The skill itself is free from lee-fuhr/claude-session-index. SkillProof publishes the install command and an independent test verdict at no cost.
Does Session Index work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 20, 2026. Verdict: Tested · Works. Ran it live against a real machine: first command auto-indexed 1126 sessions with zero errors, then FTS search for 'skill test protocol' returned five ranked sessions with dates, projects, exchange counts, durations, matching excerpts and copy-paste claude --resume links. 'analytics --week' broke 275 sessions down by project with total hours; a no-skill baseline would be reduced to manually grepping raw ~/.claude/projects jsonl with no ranking, resume links or time rollups. Docs claims (SQLite+FTS5, first-run auto-index, resume links) all matched exactly; only the cross-session synthesis feature was left unmeasured because it needs an ANTHROPIC_API_KEY, but every search/recent/analytics path worked.
What is the Session Index SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Session Index?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Session Index with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.