Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/distsystem/codex-desktop-linux/validation-playbookgit clone --depth 1 https://github.com/distsystem/codex-desktop-linuxWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.00762 |
| Opus 5 | $0.00000 | $0.00381 |
| Sonnet 5 | $0.00000 | $0.00152 |
| Haiku 4.5 | $0.00000 | $0.00076 |
Grade A, and why
validation-playbook scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Validation Playbook
Run the smallest validation set that matches the touched surface, then broaden when the change crosses package formats, launcher/runtime behavior, updater state, or patch drift handling.
Shell, Launcher, And Package Scripts
bash -n install.sh
bash -n scripts/lib/*.sh
bash -n launcher/start.sh.template
bash -n scripts/build-deb.sh
bash -n scripts/build-rpm.sh
bash -n scripts/build-pacman.sh
bash -n scripts/build-appimage.sh
For launcher behavior changes, rebuild or inspect the generated launcher:
sed -n '1,160p' codex-app/start.sh
If the change affects webview startup probes, run:
bash tests/webview_probe_equivalence.sh
Patch Registry And Linux Features
node --test scripts/patch-linux-window-ui.test.js
node --test linux-features/*/test.js
bash tests/scripts_smoke.sh
For upstream drift or protected surface analysis:
make inspect-upstream DMG=/path/to/Codex.dmg
make inspect-upstream-intel-devcontainer
For patch report validation:
scripts/ci/validate-patch-report.js codex-app/.codex-linux/patch-report.json
Rust Crates
Updater:
cargo check -p codex-update-manager
cargo test -p codex-update-manager
Linux Computer Use:
cargo check -p codex-computer-use-linux
cargo test -p codex-computer-use-linux
Read Aloud:
cargo check -p codex-read-aloud-linux
cargo test -p codex-read-aloud-linux
Record & Replay:
cargo check -p codex-record-replay-linux
cargo test -p codex-record-replay-linux
Package Payloads
Build the relevant package format and inspect metadata/layout:
./scripts/build-deb.sh
dpkg-deb -I dist/codex-desktop_*.deb
dpkg-deb -c dist/codex-desktop_*.deb | sed -n '1,80p'
Run other package formats when shared payload logic, package hooks, updater bundles, desktop files, permissions, or runtime helpers are touched:
./scripts/build-rpm.sh
./scripts/build-pacman.sh
./scripts/build-appimage.sh
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 141 lines · 0 tokens per session scan A bf814920e389
validation-playbook is an agent published in the GitHub repository distsystem/codex-desktop-linux (11 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 762 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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