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

dot_agents/skills/linear/agents/openai.yaml

@@ -0,0 +1,14 @@
+interface:
+  display_name: "Linear"
+  short_description: "Manage Linear issues in Codex"
+  icon_small: "./assets/linear-small.svg"
+  icon_large: "./assets/linear.png"
+  default_prompt: "Use Linear context to triage or update relevant issues for this task, with clear next actions."
+
+dependencies:
+  tools:
+    - type: "mcp"
+      value: "linear"
+      description: "Linear MCP server"
+      transport: "streamable_http"
+      url: "https://mcp.linear.app/mcp"