Context Save
garrytan/gstack
Captures git state, decisions made and remaining work so that a later session can resume the task without losing context.
Find missed token savings in Claude Code sessions and create filters for unfiltered commands
MITAuto-check passed
Install Tokf Discover
$ npx skills add mpecan/tokf --skill tokf-discover -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mpecan/tokf tokf-discover --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .claude/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .claude/skills/tokf-discover && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .claude/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discoverType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mpecan/tokf --skill tokf-discover -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mpecan/tokf tokf-discover --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .agents/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .agents/skills/tokf-discover && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .agents/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mpecan/tokf --skill tokf-discover -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mpecan/tokf tokf-discover --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .cursor/skills/tokf-discover && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .cursor/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mpecan/tokf.git --path crates/tokf-cli/skills/tokf-discover--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mpecan/tokf --skill tokf-discover -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mpecan/tokf tokf-discover --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .gemini/skills/tokf-discover && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .gemini/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mpecan/tokf tokf-discoverInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mpecan/tokf --skill tokf-discover -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .github/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .github/skills/tokf-discover && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .github/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mpecan/tokf --skill tokf-discover -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mpecan/tokf tokf-discover --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mpecan/tokf.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/crates/tokf-cli/skills/tokf-discover .opencode/skills/tokf-discover && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "tokf-discover" agent skill from https://github.com/mpecan/tokf/tree/main/crates/tokf-cli/skills/tokf-discover into .opencode/skills/tokf-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tokf-discover", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
tokf-discover- GitHub stars
- 199
- Token cost
- ~575 tokens
- SKILL.md length
- 253 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- MIT
At a glance
Find missed token savings in Claude Code sessions and create filters for unfiltered commands
- Works in 4 steps: Run tokf discover to identify top… → For commands with existing filters: run… → For commands without filters: use… → …
- SKILL.md covers Quick Start, Options, Interpreting Results and Workflow, plus 2 more sections
- Calls jq
What it does
Tokf Discover is an agent skill from mpecan/tokf. Find missed token savings in Claude Code sessions and create filters for unfiltered commands
Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Config-driven CLI tool that compresses command output before it reaches an LLM context. The licence is MIT.
Example prompts
- “/tokf-discover”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Run tokf discover to identify top savings opportunities
- For commands with existing filters: run tokf hook install to set up automatic filtering
- For commands without filters: use /tokf-filter skill to create a custom filter
- Re-run tokf discover after changes to verify improvement
What it can do on your machine
Read from SKILL.md and the folder at commit 87c93d9. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
jq
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Tokf Discover loads about 575 tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 253 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from mpecan/tokf at commit 87c93d9, republished under its MIT licence (© mpecan). 253 words, ~575 tokens.
Download SKILL.mdSave it as
.claude/skills/tokf-discover/SKILL.md (or your agent's skills folder).- name
- tokf-discover
- description
- Find missed token savings in Claude Code sessions and create filters for unfiltered commands
- user_invocable
- true
tokf discover — Find Missed Token Savings
Use this skill to analyze Claude Code sessions and find commands that are running without tokf filtering, wasting tokens on verbose output.
Quick Start
Run tokf discover in the project directory to scan recent sessions:
tokf discoverOptions
--all— scan all projects, not just the current one--since 7d— only scan sessions from the last 7 days (also24h,30m)--limit 0— show all results (default: top 20)--json— output as JSON for programmatic use--session <path>— scan a specific session file--project <path>— scan sessions for a specific project path
Interpreting Results
The output shows:
- COMMAND — the shell command pattern being run without filtering
- FILTER — the tokf filter that would handle it
- RUNS — how many times it appeared in sessions
- TOKENS — estimated token count of unfiltered output
- SAVINGS — estimated tokens that filtering would save
Workflow
- Run
tokf discoverto identify top savings opportunities - For commands with existing filters: run
tokf hook installto set up automatic filtering - For commands without filters: use
/tokf-filterskill to create a custom filter - Re-run
tokf discoverafter changes to verify improvement
Creating Filters for Unfiltered Commands
If tokf discover shows commands with no matching filter, create one:
# See what a filter would look like
tokf which "the-command --args"
# Use the tokf-filter skill to create a proper filter
# /tokf-filterJSON Output
Use --json for integration with other tools:
tokf discover --json | jq '.results[] | select(.estimated_savings > 1000)'The JSON schema includes:
sessions_scanned— number of JSONL files processedtotal_commands— all Bash commands foundalready_filtered— commands already using tokffilterable_commands— commands with available filtersno_filter_commands— commands with no matching filterestimated_total_savings— total estimated token savingsresults[]— per-command breakdown sorted by savings
© mpecan, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in crates/tokf-cli/skills/tokf-discover of mpecan/tokf.
Open the folder on GitHubat commit 87c93d9
Compare with similar skills
Tokf Discover next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Tokf Discover this skillmpecan/tokf | 199 | — | ~575 | Automated safety check: Pass | MIT | |
| Context Savegarrytan/gstack | 136k | — | ~9.9k | Automated safety check: Notes | MIT | |
| Session Handoffsickn33/agentic-awesome-skills | 47k | — | ~1.8k | Automated safety check: Notes | MIT | |
| Sessionanthropics/claude-for-legal | 9.6k | 3 repos | ~478 | Automated safety check: Pass | Apache-2.0 | |
| Session History Searchslopus/happy | 24k | — | ~3.1k | Automated safety check: Pass | MIT | |
| Session Handoffdavila7/claude-code-templates | 33k | 2 repos | ~1.6k | Automated safety check: Pass | MIT |
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Run a focused N-question study session on a subject — MBE, essay, or flashcards.
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Searches past Claude Code, Codex and Cursor sessions and summarizes what was worked on, tried or decided, using extraction scripts instead of reading raw logs.
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More from mpecan/tokf
Tokf Filter
mpecan/tokf
This skill should be used when the user asks to "create a filter", "write a tokf filter", "add a filter for <tool", "how do I filter output", or needs guidance on tokf filter step types, templates…
Tokf Run
mpecan/tokf
Compress verbose CLI output with tokf before returning results.
Tokf Discover
mpecan/tokf
Find missed token savings by scanning AI coding session files for commands that ran without tokf filtering.
Questions about Tokf Discover
What does Tokf Discover do?
Find missed token savings in Claude Code sessions and create filters for unfiltered commands. Tokf Discover is an agent skill from mpecan/tokf.
How do I install Tokf Discover in Claude Code?
Run `npx skills add mpecan/tokf --skill tokf-discover -a claude-code`. Or copy the skill folder (crates/tokf-cli/skills/tokf-discover in mpecan/tokf) into .claude/skills/tokf-discover in your project. Claude Code loads it when a task matches its description.
How do I install Tokf Discover in Codex?
Run `npx skills add mpecan/tokf --skill tokf-discover -a codex`. Or copy the skill folder (crates/tokf-cli/skills/tokf-discover in mpecan/tokf) into .agents/skills/tokf-discover in your project. Codex loads it when a task matches its description.
Can I use Tokf Discover in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mpecan/tokf --skill tokf-discover -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tokf-discover, .gemini/skills/tokf-discover, .github/skills/tokf-discover and .opencode/skills/tokf-discover in your project.
What does Tokf Discover need to run?
Going by SKILL.md and its folder, Tokf Discover needs the command-line tools its instructions call (jq).
Does Tokf Discover access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Tokf Discover safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Tokf Discover use?
Tokf Discover is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tokf Discover use?
About 575 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Tokf Discover?
Skills that share tags, products or a category with Tokf Discover: Context Save (garrytan/gstack, 136k stars), Session Handoff (sickn33/agentic-awesome-skills, 47k stars), Session (anthropics/claude-for-legal, 9.6k stars) and Session History Search (slopus/happy, 24k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tokf Discover?
mpecan (a GitHub user) maintains it in mpecan/tokf, which has 199 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 10, 2026.
Source: mpecan/tokf on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.