engine-sync 0.3.0

Added

• Agent frontmatter carries per-engine settings in an engines: block (Codex model, effort and sandbox; OpenCode model, mode and permission; false skips an engine). One YAML node parser serves every source kind; a header failing strict YAML is retried once with single-line values read as literal strings, and one that still fails is FRONTMATTER-INVALID {file}:{line}, skipped by name.
• Derived machine agents are declaration files: a machine source carrying from: declares one rendered agent whose Claude-native keys and ## Heading body sections replace the base's; retitle, pins, add, unset, rename, prepend and append shape it, and variants pin rewrites a file's pins: block in place. A declaration extends a shared .md below a subdirectory by relative path; a shared file nothing extends is reported SHARED-UNUSED.
• Machine agents are capability-gated: requires is checked against --capability and the targets.json capabilities list, and machine GPT agents install only when asked for.
• machine.sourceGeneratedAgentsDir (source-repository-relative, empty by default) renders declarations beside their sources instead of the home store; links point there, global retires what it owned in the home store, and --uninstall never removes the repository directory.
• Machine doctor is closed-world: INSTALLED, MISSING, STALE, SHADOWED, SKIPPED, BROKEN, STRAY, and a failing ORPHAN row for each rendered file whose declaration is gone. global --adopt moves shadowing hand files to the adopted store; one broken agent is skipped by name and keeps its installed copy.

Changed

• Rendered machine agents carry a role stamp and a mark naming engine-sync global; OpenCode global agents are written under agents/. Project Codex role names are the frontmatter name verbatim; targets.json codexHomes is optional.
• check and doctor see the whole Claude roster for the source collision; check skips a directory holding no declaration. A declaration inside a Claude agents directory engine-sync installs into is a named problem and is never replaced.

Removed

• --gpt-agents: use --capability. Flat codex-* and opencode-* agent keys, the machine.variants carrier (variants.json), machine.modelMap, opencode.agent and abstract: are refused, each naming its replacement: port each variants.json entry to its own {machine.sourceAgentsDir}/{name}.md declaration and each abstract to a shared file it extends.

Fixed

• global --adopt change events carry no path, as docs/interface.md's JSON contract says.
• Reconciliation retires only assets engine-sync owns; a registry link with no receipt that points at an engine-sync-generated file is recognized as ours, so a moved render repoints it, and a moved home store is retired only after the registry links repoint, so no link dangles into it.