shell: fish functions -> ~/.local/bin executables + bash/zsh ports; manage ~/.agents

- 16 cross-shell utilities converted to sh/bash chezmoi executables:
  ai c2p cp-appid extract_agents fab gdc gh-sonr-org-migrate ghg-clone
  ghn gho git-summary launch_omp_livediff_overlay lc-elir mdcp mdp pj
  (ghg-clone not named ghg: unrelated cargo binary owns that name)
- cwd/history helpers stay per-shell: yy c cd clip-last + ghg/ghn/gho
  cd-wrappers in bash/functions/ and zsh/functions/, loaded by rc files
- fish keeps only shell-state functions; converted ones now hit PATH
- cp-appid ignore gating moved to .local/bin path
- dot_agents/skills: 82 skills materialized from dotstate storage so
  dot_claude skill symlinks resolve on fresh bootstrap; dotstate
  profile/symlinks.json released .agents/skills .bashrc .zshrc

README.md

@@ -38,6 +38,16 @@ Aliases are defined once in `.chezmoidata/aliases.yaml` and rendered
 into fish (`fish/conf.d/20-aliases.fish`) and bash/zsh
 (`~/.config/shell/aliases.sh`, sourced by `.bashrc`/`.zshrc`).
 
+Shell utilities live as standalone sh/bash executables in
+`~/.local/bin` (ai, c2p, fab, gdc, gho, ghn, ghg-clone, git-summary,
+mdp, mdcp, pj, …) so all shells share one implementation. Helpers that
+must mutate shell state (`cd`-style: yy, c, cd, ghg/ghn/gho wrappers,
+clip-last) are per-shell functions in `fish/functions/`,
+`bash/functions/`, and `zsh/functions/`.
+
+`~/.agents/skills` (agent skill library) is managed directly; the
+symlinks under `~/.claude/skills` resolve against it.
+
 Linux desktop (role `desktop`/`laptop` only): niri, noctalia,
 fontconfig, mimeapps, systemd user units, niri-launch.