codex-1m-context-window-setup SKILL.md skillA
codex-1m-context-window-setup from daymade/claude-code-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add daymade/claude-code-skills/codex-1m-context-window-setup@git:20261030.b71a4f5Pins git:20261030.b71a4f5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- daymade/claude-code-skills
- Path
daymade-codex/codex-1m-context-window-setup/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261030.b71a4f5, committed Oct 30, 2026
- First version recorded
- Aug 27, 2026
- Size
- 8,191 bytes
- Repository stars
- 1,519
- License
- MIT
Configures and verifies an expanded, model-aware context window for OpenAI Codex CLI and Desktop. Use to inspect local context settings, lower or set the auto-compaction threshold, expand ~258K context to 500K or 1M, or repair model_context_window/model_auto_compact_token_limit. Not for changing the selected model or other Codex settings.
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
# Codex 1m Context Window Setup Inspect local settings or change only automatic compaction. For full context expansion, read Codex's current model catalog, cap the request at the model's declared maximum, and apply the bundled expansion preset. ## Route the request | User intent | Action | |---|---| | Read the current base-config window or compaction threshold | Run `show`; no Codex process or model catalog needed | | Lower/set only automatic compaction | Run `show`, then `set-compact --tokens N` | | Explain 258K, diagnose model limits, or preview full expansion | Run `doctor` | | Configure/fix/raise the context window | Run `apply` | | Confirm a prior setup is still correct after an update or model switch | Run `verify` | Honor a user-specified threshold exactly. If the user only asks for a small reduction, choose and state a modest reversible reduction from the observed value. For expansion, derive attainable values from the live catalog instead of asking the user for model limits. Running `apply` selects the full expansion preset and replaces a custom threshold; do it only when full setup is requested. …
Read the whole file at its exact version.
How to install
mdr add daymade/claude-code-skills/codex-1m-context-window-setup@sha256:46db1048db8b5c68The line at the top of this page pins the label git:20261030.b71a4f5, 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.
[](https://markdownregistry.com/a/art_yuf3ewgi5z5jsrti)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 27, 2026 and Oct 30, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.b71a4f5 latest | 2026-10-30 | b71a4f5 | 8,191 B | A | view · diff |
| git:20261029.2d3f87f | 2026-10-29 | 2d3f87f | 7,827 B | A | view · diff |
| git:20260923.943df48 | 2026-09-23 | 943df48 | 4,694 B | A | view · diff |
| git:20260827.fe44e9c | 2026-08-27 | fe44e9c | 5,036 B | A | view · diff |
| git:20260827.58405f8 | 2026-08-27 | 58405f8 | 4,215 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8191 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
daymade/claude-code-skills · 1,519 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yuf3ewgi5z5jsrti GET https://markdownregistry.com/api/v1/resolve?ref=daymade/claude-code-skills/codex-1m-context-window-setup GET https://markdownregistry.com/api/v1/blob/46db1048db8b5c6856e4908e8056857077b373716a261b1b3ef9f2752abbf427
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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.