Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents; keep summaries in the main thread, not raw payloads.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Guard the Context Window
**Why:** Context overflow degrades reasoning quality, creates compression artifacts, and halts progress.
**Pattern:**
- **Size phases and cap scope.** Limit files per phase, set turn budgets, account for mechanism costs.
The line at the top of this page pins the label git:20261013.058a348, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_okms5yg2zowhux2g
GET https://markdownregistry.com/api/v1/resolve?ref=michael-denyer/pstack-claude/principle-guard-the-context-window
GET https://markdownregistry.com/api/v1/blob/6db84b7d5e67fb4e2e6a260605f2c2e34fbeaa1bc0e49645eef6f00a17543778
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
michael-denyer/pstack-claude · plugins/pstack/skills/architect/SKILL.md · Sketch types, signatures, and module structure before code, then stay in the loop while implementation fills in. Use…
michael-denyer/pstack-claude · plugins/pstack/skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
michael-denyer/pstack-claude · plugins/pstack/skills/automate-me/SKILL.md · Use for "automate me", "create/update/refresh my -mode skill", "turn/capture my preferences or working style into a…
michael-denyer/pstack-claude · plugins/pstack/skills/babysit/SKILL.md · Watch an open PR — fix failing CI, handle the straightforward review comments, and drive it to a mergeable state…
michael-denyer/pstack-claude · plugins/pstack/skills/benchmark-checklist/SKILL.md · Vet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened)…
michael-denyer/pstack-claude · plugins/pstack/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
michael-denyer/pstack-claude · plugins/pstack/skills/bro/SKILL.md · Restate the last message in plain human language, with no jargon. Use for /bro or when asked to say it plainly.
michael-denyer/pstack-claude · plugins/pstack/skills/correct/SKILL.md · Find the mistakes agents keep repeating in this repo and make each one impossible. Try architecture first, then types…
michael-denyer/pstack-claude · plugins/pstack/skills/create-formal-verification-skill/SKILL.md · Generate a project-local skill that formally verifies the code where a bug costs the most and tests reach the least, in…
michael-denyer/pstack-claude · plugins/pstack/skills/create-verification-skill/SKILL.md · Generate a project-local verification skill that drives your app the way a user does — any language, framework, or…
michael-denyer/pstack-claude · plugins/pstack/skills/figure-it-out/SKILL.md · Design an auditable playbook when no narrower one fits: a large migration, an ambitious multi-part change, or work a…
cursor/plugins · pstack/skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
cursor/plugins · harness/pstack/claude-code/skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
nightly-labs/openbot · marketplace/production-catalog/bundles/pstack/skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
backnotprop/pstack · skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
iap/pstack-hermes · skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
j-star-films-studios/vibecode-protocol-suite · assets/.agent/skills/engineering-principles/guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
barbieri/local-openfinance · .agents/skills/principle-guard-the-context-window/SKILL.md · Apply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents…
theonlyfusioncube/potetos-for-everyone · skills/principle-guard-the-context-window/SKILL.md · Route bulk exploration to isolated workers or files and bring back compact evidence summaries, not raw floods. Use when…
