Context Mode Output Sandbox
mksglu/context-mode
Routes large command, file, API and browser output through context-mode tools so only the needed result enters the agent's context, instead of dumping it via Bash.
Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it.
Install Context Decay
$ npx skills add pskoett/pskoett-ai-skills --skill context-decay -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install pskoett/pskoett-ai-skills context-decay --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/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/context-decay .claude/skills/context-decay && 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 "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .claude/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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/pskoett/pskoett-ai-skills/tree/main/skills/context-decayType 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 pskoett/pskoett-ai-skills --skill context-decay -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install pskoett/pskoett-ai-skills context-decay --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/context-decay .agents/skills/context-decay && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .agents/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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 pskoett/pskoett-ai-skills --skill context-decay -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install pskoett/pskoett-ai-skills context-decay --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/context-decay .cursor/skills/context-decay && 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 "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .cursor/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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/pskoett/pskoett-ai-skills.git --path skills/context-decay--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 pskoett/pskoett-ai-skills --skill context-decay -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install pskoett/pskoett-ai-skills context-decay --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/context-decay .gemini/skills/context-decay && 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 "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .gemini/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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 pskoett/pskoett-ai-skills context-decayInstalls 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 pskoett/pskoett-ai-skills --skill context-decay -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/context-decay .github/skills/context-decay && 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 "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .github/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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 pskoett/pskoett-ai-skills --skill context-decay -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install pskoett/pskoett-ai-skills context-decay --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pskoett/pskoett-ai-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/context-decay .opencode/skills/context-decay && 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 "context-decay" agent skill from https://github.com/pskoett/pskoett-ai-skills/tree/main/skills/context-decay into .opencode/skills/context-decay/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "context-decay", 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
context-decay- GitHub stars
- 314
- Token cost
- ~3.3k tokens
- SKILL.md length
- 1,703 words
- Files
- 82 (incl. references)
- Skills in repo
- 24
- Repo updated
- First seen
- Licence
- None found
At a glance
Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it.
- Works in 5 steps: Identify the claim and its authority → Classify cause and cadence → Check and choose an outcome → …
- Reviewing skills
- SKILL.md covers Install, Scope and activation, 1. Identify the claim and its… and 2. Classify cause and cadence, plus 6 more sections
- Runs Python scripts from its folder; calls gh and npx
What it does
Context Decay is an agent skill from pskoett/pskoett-ai-skills. Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it. Use when reviewing skills, stored instructions, facts, preferences, assumptions, or workflows; when an owner, decision, or dependency changes; or when self-improvement captures, reviews, or promotes a learning. Works independently of self-improvement. Not for runtime context-window degradation, unsaved task observations, or age-based deletion.
Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 91 other files, including reference files (for example `evals/EVALS.md`, `evals/evals.json` and `evals/fixtures/approval-blocked-heal/.learnings/HEALS.md`).
It sits in Agent Workflows, covering Context engineering.
When your agent uses it
- Reviewing skills
- Stored instructions
- Dependency changes
- Self-improvement captures
Example prompts
- “/context-decay”
Requirements
- Python 3
- Node.js
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Identify the claim and its authority
- Classify cause and cadence
- Check and choose an outcome
- Keep a lightweight context contract
- Apply within scope and report
What it can do on your machine
Read from SKILL.md and the folder at commit 5a836dc. 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
Ships script files (Python, from the files we listed), which the agent can run.
Shell commands in SKILL.md call:
ghnpx
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use gh and npx, which can reach the network depending on how they are called.
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
Context Decay loads about 3.3k tokens when it runs, and up to ~6k if it reads all its reference files. Until then it costs about 128 tokens; SKILL.md has 1,703 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,703 words (~3,292 tokens).
“Persistent context needs a theory of how it could stop being useful. Decay type determines how to revalidate. Decay rate determines when. Age alone proves neither that context is wrong nor that it should be removed. Truth and usefulness must…”
- name
- context-decay
Files
SKILL.md and 81 other files (references) in skills/context-decay of pskoett/pskoett-ai-skills.
- SKILL.md
- evals/EVALS.md
- evals/evals.json
- evals/fixtures/approval-blocked-heal/.learnings/HEALS.md
- evals/fixtures/approval-blocked-heal/failure.txt
- evals/fixtures/approval-blocked-heal/installed/export-data/SKILL.md
- evals/fixtures/approval-blocked-heal/skills/export-data/SKILL.md
- evals/fixtures/approval-blocked-heal/skills/export-data/scripts/export.py
- evals/fixtures/approval-blocked-heal/source-map.md
- evals/fixtures/approval-blocked-heal/tool-docs.md
- evals/fixtures/approved-skill-edit/installed
- … and 71 more
Open the folder on GitHubat commit 5a836dc
Compare with similar skills
Context Decay 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 |
|---|---|---|---|---|---|---|
| Context Decay this skillpskoett/pskoett-ai-skills | 314 | — | ~3.3k | Automated safety check: Pass | None | |
| Context Mode Output Sandboxmksglu/context-mode | 26k | — | ~4.1k | Automated safety check: Pass | Custom licence | |
| Memori Long-Term MemoryMemoriLabs/Memori | 17k | — | ~2k | Automated safety check: Notes | Custom licence | |
| Picoclaw Skill Creatorsipeed/picoclaw | 30k | — | ~4.4k | Automated safety check: Pass | MIT | |
| ccc Semantic Code Searchcocoindex-io/cocoindex-code | 2.8k | — | ~938 | Automated safety check: Pass | Apache-2.0 | |
| Context Mode for Antigravity CLImksglu/context-mode | 26k | — | ~850 | Automated safety check: Pass | Custom licence |
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Connects Claude Code to Memori Cloud for long-term memory, recalling stored context before substantive replies and saving new context afterward.
Picoclaw Skill Creator
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Guidance for creating, updating and reviewing Picoclaw skills, from the SKILL.md structure to organizing bundled scripts, references and assets.
ccc Semantic Code Search
cocoindex-io/cocoindex-code
Semantic code search and index management with the ccc CLI: the agent initializes, indexes and queries the project by concept, filtering by language or path.
Context Mode for Antigravity CLI
mksglu/context-mode
Routing rules for using context-mode MCP tools in Antigravity CLI: sandboxed code runs, file analysis, indexed search and web fetches that keep large output out of the conversation.
Token Optimizer
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Audit a Claude Code or Codex setup for context-window waste, then fix it and measure the savings.
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Related
Categories
Questions about Context Decay
What does Context Decay do?
Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it. Context Decay is an agent skill from pskoett/pskoett-ai-skills. Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it.
When should I use Context Decay?
Context Decay fits situations like: reviewing skills; stored instructions; dependency changes; self-improvement captures.
How do I install Context Decay in Claude Code?
Run `npx skills add pskoett/pskoett-ai-skills --skill context-decay -a claude-code`. Or copy the skill folder (skills/context-decay in pskoett/pskoett-ai-skills) into .claude/skills/context-decay in your project. Claude Code loads it when a task matches its description.
How do I install Context Decay in Codex?
Run `npx skills add pskoett/pskoett-ai-skills --skill context-decay -a codex`. Or copy the skill folder (skills/context-decay in pskoett/pskoett-ai-skills) into .agents/skills/context-decay in your project. Codex loads it when a task matches its description.
Can I use Context Decay 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 pskoett/pskoett-ai-skills --skill context-decay -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/context-decay, .gemini/skills/context-decay, .github/skills/context-decay and .opencode/skills/context-decay in your project.
What does Context Decay need to run?
Going by SKILL.md and its folder, Context Decay needs Python for the scripts in its folder and the command-line tools its instructions call (gh and npx). Our summary lists: Python 3; Node.js.
Does Context Decay access the network?
SKILL.md contains no URLs. Its commands use gh and npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Context Decay 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 Context Decay use?
No licence was found for Context Decay or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Context Decay use?
About 3.3k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.7k tokens, read only when the agent opens those files.
What are the alternatives to Context Decay?
Skills that share tags, products or a category with Context Decay: Context Mode Output Sandbox (mksglu/context-mode, 26k stars), Memori Long-Term Memory (MemoriLabs/Memori, 17k stars), Picoclaw Skill Creator (sipeed/picoclaw, 30k stars) and ccc Semantic Code Search (cocoindex-io/cocoindex-code, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Context Decay?
pskoett (a GitHub user) maintains it in pskoett/pskoett-ai-skills, which has 314 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on October 5, 2026.
Source: pskoett/pskoett-ai-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.