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-cli/references/milestone.md

@@ -0,0 +1,124 @@
+# milestone
+
+> Manage Linear project milestones
+
+## Usage
+
+```
+Usage:   linear milestone
+
+Description:
+
+  Manage Linear project milestones
+
+Options:
+
+  -h, --help           - Show this help.                      
+  --workspace  <slug>  - Target workspace (uses credentials)  
+
+Commands:
+
+  list                    - List milestones for a project       
+  view, v  <milestoneId>  - View milestone details              
+  create                  - Create a new project milestone      
+  update   <id>           - Update an existing project milestone
+  delete   <id>           - Delete a project milestone
+```
+
+## Subcommands
+
+### list
+
+> List milestones for a project
+
+```
+Usage:   linear milestone list --project <projectId>
+
+Description:
+
+  List milestones for a project
+
+Options:
+
+  -h, --help                - Show this help.                                
+  --workspace  <slug>       - Target workspace (uses credentials)            
+  --project    <projectId>  - Project ID                           (required)
+```
+
+### view
+
+> View milestone details
+
+```
+Usage:   linear milestone view <milestoneId>
+
+Description:
+
+  View milestone details
+
+Options:
+
+  -h, --help           - Show this help.                      
+  --workspace  <slug>  - Target workspace (uses credentials)
+```
+
+### create
+
+> Create a new project milestone
+
+```
+Usage:   linear milestone create --project <projectId> --name <name>
+
+Description:
+
+  Create a new project milestone
+
+Options:
+
+  -h, --help                    - Show this help.                                
+  --workspace    <slug>         - Target workspace (uses credentials)            
+  --project      <projectId>    - Project ID                           (required)
+  --name         <name>         - Milestone name                       (required)
+  --description  <description>  - Milestone description                          
+  --target-date  <date>         - Target date (YYYY-MM-DD)
+```
+
+### update
+
+> Update an existing project milestone
+
+```
+Usage:   linear milestone update <id>
+
+Description:
+
+  Update an existing project milestone
+
+Options:
+
+  -h, --help                    - Show this help.                          
+  --workspace    <slug>         - Target workspace (uses credentials)      
+  --name         <name>         - Milestone name                           
+  --description  <description>  - Milestone description                    
+  --target-date  <date>         - Target date (YYYY-MM-DD)                 
+  --sort-order   <value>        - Sort order relative to other milestones  
+  --project      <projectId>    - Move to a different project
+```
+
+### delete
+
+> Delete a project milestone
+
+```
+Usage:   linear milestone delete <id>
+
+Description:
+
+  Delete a project milestone
+
+Options:
+
+  -h, --help           - Show this help.                      
+  --workspace  <slug>  - Target workspace (uses credentials)  
+  -f, --force          - Skip confirmation prompt
+```