feat(codex): document native image generation in /codex skill#1986
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seungwonme wants to merge 1 commit into
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feat(codex): document native image generation in /codex skill#1986seungwonme wants to merge 1 commit into
seungwonme wants to merge 1 commit into
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Codex CLI ships a native image_gen.imagegen tool, but the skill's read-only sandbox rule makes image-generation consults silently fail: the tool call succeeds, the PNG can't be saved. - Add Image Generation section: swap to -s workspace-write for image-making consults, scope writes to a scratch dir under TMP_ROOT (-C + --skip-git-repo-check), show the result to the user - Name this as the sole exception in Important Rules - Regenerate codex/SKILL.md via bun run gen:skill-docs Verified by having Codex enumerate its callable tools and generate a 1254x1254 PNG with code-drawing fallbacks (SVG/matplotlib) forbidden.
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TL;DR
Codex CLI ships a native image-generation tool (
image_gen.imagegen), but the /codex skill's hard "read-only, never modify files" rule makes image-generation consults silently fail — the tool call succeeds, the generated PNG just can't be saved. This documents the capability and the one sanctioned exception.What changed
## Image Generationsection incodex/SKILL.md.tmpl(after Model & Reasoning):-s read-only→-s workspace-writewhen the consult asks Codex to MAKE an image (not analyze one)$TMP_ROOTvia-C+--skip-git-repo-check, so nothing lands in the user's repoImportant Rulesfirst bullet now names this as the sole exception to "Never modify files"codex/SKILL.mdregenerated viabun run gen:skill-docsVerified
Asked Codex to enumerate its callable tools and generate an image with code-drawing fallbacks (SVG/matplotlib) explicitly forbidden: it listed
image_gen.imagegenand produced a real 1254×1254 PNG. Saving worked underworkspace-write; the skill's defaultread-onlysandbox blocks it.