Update flake inputs
Claude Code 2.1.280 -> 2.1.287, Codex 0.155.1 -> 0.159.3, nixpkgs 2026-09-25 -> 2026-10-01.
Describe --model in the companions skill
The Claude Code call now says how to pick a model: an alias (fable, opus,
haiku) for the latest of a family or a full name to pin a version. The
companions check greps the generated skill for the flag.
Add claude.plugins: plugin directories loaded with --plugin-dir
Add packages: tools on every launcher's PATH
Add companions: every launcher of an environment callable from its sessions
Export AGENT_ENV_LAUNCHER, the launcher's command name
Add example consumer flakes
Add real Codex integration check
Add behaviour checks with stub agents
Add flake with a default environment without skills
Add library: mkEnvironment, mkSkill and mkSkillModule
Add launchers with a state dir per login
Add Claude Code and Codex agent modules
Add core module: instruction fragments and skill closure