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/obsidian-vault/SKILL.md

@@ -0,0 +1,59 @@
+---
+name: obsidian-vault
+description: Search, create, and manage notes in the Obsidian vault with wikilinks and index notes. Use when user wants to find, create, or organize notes in Obsidian.
+---
+
+# Obsidian Vault
+
+## Vault location
+
+`/mnt/d/Obsidian Vault/AI Research/`
+
+Mostly flat at root level.
+
+## Naming conventions
+
+- **Index notes**: aggregate related topics (e.g., `Ralph Wiggum Index.md`, `Skills Index.md`, `RAG Index.md`)
+- **Title case** for all note names
+- No folders for organization - use links and index notes instead
+
+## Linking
+
+- Use Obsidian `[[wikilinks]]` syntax: `[[Note Title]]`
+- Notes link to dependencies/related notes at the bottom
+- Index notes are just lists of `[[wikilinks]]`
+
+## Workflows
+
+### Search for notes
+
+```bash
+# Search by filename
+find "/mnt/d/Obsidian Vault/AI Research/" -name "*.md" | grep -i "keyword"
+
+# Search by content
+grep -rl "keyword" "/mnt/d/Obsidian Vault/AI Research/" --include="*.md"
+```
+
+Or use Grep/Glob tools directly on the vault path.
+
+### Create a new note
+
+1. Use **Title Case** for filename
+2. Write content as a unit of learning (per vault rules)
+3. Add `[[wikilinks]]` to related notes at the bottom
+4. If part of a numbered sequence, use the hierarchical numbering scheme
+
+### Find related notes
+
+Search for `[[Note Title]]` across the vault to find backlinks:
+
+```bash
+grep -rl "\\[\\[Note Title\\]\\]" "/mnt/d/Obsidian Vault/AI Research/"
+```
+
+### Find index notes
+
+```bash
+find "/mnt/d/Obsidian Vault/AI Research/" -name "*Index*"
+```