Behavior Documentation Skill

# <Tool> Behavior

**Default mode notation:** `[n]` omitted = normal mode  
**Chord spelling:** `<leader>ff` (no spaces within a sequence)  
**Leader / prefix:** `<leader>` = Space, `<localleader>` = `;`

Adapt the header for non-Neovim tools (e.g. tmux uses prefix not <leader>).

2. Philosophy (2–6 bullets, freeform)

Short, opinionated statements about how this tool's keyboard layer should feel. These are stable values — they change only when you deliberately decide to change your workflow philosophy.

## Philosophy

- Prefer fuzzy, filterable list pickers over blind commands wherever a list makes sense.
- After sending content to an external tool, focus should follow so output is immediately visible.
- Related actions share a namespace prefix; the first key signals the domain, the second specifies the action.
- Frequent actions get short chords; infrequent or destructive actions get longer ones.

3. Compact behavior catalog

One line per fact, organized into prefix groups separated by blank lines.

Compact Notation

Line grammar

<binding> → <kind>: <payload>

Binding — Full chord with no spaces within the sequence: <leader>ff, <C-p>, prefix+r.
Kind — Fixed vocabulary (see below).
Payload — User-visible behavior in plain language. No plugin names, no API calls.

Kind vocabulary

Mode prefix (Neovim)

When the same chord does different things in different modes, prefix the line:

[n] <leader>O? → leaf: free-text prompt → send to current route
[v] <leader>O? → leaf: prompt, append visual selection, send

Omit [n] for normal-mode-only lines (stated once in the header).

Ordering within a group

1. domain line first
2. contract line(s) next
3. exception lines immediately after the contract they modify
4. leaf lines last (most specific chords at the end)
5. note lines after the leaf they annotate

Example: Neovim find namespace

<leader>f  → domain: find / search (locate files, text, symbols, repo objects)
<leader>f  → contract: every command in this namespace presents a fuzzy, filter-as-you-type picker; preview is optional but fuzzy filtering is not

<leader>ff → leaf: pick and open a file from the current project root(s)
<leader>fg → leaf: git-scoped file or content search
<leader>fb → leaf: pick from open buffers
<leader>fs → leaf: pick a symbol (LSP) in the current file or project
<leader>fr → leaf: pick from recently opened files

Example: Neovim external agent namespace

<leader>O  → domain: external agent / outboard AI tools
<leader>O  → contract: after any send, toggle, or focus action the target ends up focused so output is immediately readable without hunting for the pane

[n] <leader>Oo → leaf: show or hide the agent UI for the current route; focus it when shown
[n] <leader>O? → leaf: free-text prompt → send to current route
[v] <leader>O? → leaf: prompt, append visual selection, send
[n] <leader>OP → leaf: pick a canned prompt from the library → send (templates expanded by the integration)
[n] <leader>OS → leaf: pick which backend/route receives subsequent sends
[n] <leader>Ox → leaf: close or tear down the current route's target(s)
[v] <leader>Oa → leaf: send visual selection to current route

Hierarchical conventions (prefix families)

Namespaces can share a parent convention. Document the parent with a domain + contract line, then document each child namespace separately. Child groups inherit parent contracts unless they have an explicit exception.

<leader>g  → domain: git operations
<leader>g  → contract: destructive git actions (reset, force push) always prompt for confirmation before executing

<leader>gs → leaf: show git status with diff preview
<leader>gc → leaf: pick a branch and checkout
<leader>gb → leaf: show git blame for current file
<leader>gp → leaf: push current branch (prompts for confirmation if force required)
<leader>gp → exception: force push bypasses the confirmation contract only when an explicit --force flag is acknowledged in the prompt

Workflow: writing a new BEHAVIOR.md

1. Start with philosophy — ask "what would feel broken if a replacement plugin didn't do it?" Those are your contracts and non-negotiables.
2. Group by prefix family — list the namespaces (<leader>f, <leader>g, etc.), write domain + contract for each.
3. Fill in leaves — one line per binding. Write the user-visible outcome, not the implementation.
4. Add exceptions — any binding that violates a parent contract gets an exception line immediately after the contract it breaks.
5. Add notes sparingly — only when a precondition or tool-specific restriction would surprise someone trying to replace the plugin.

Workflow: updating during a plugin swap

When replacing a plugin:

1. Read the tool's BEHAVIOR.md — the contract lines are the must-haves, leaf lines are the full requirement set.
2. Implement the new plugin to satisfy all contract lines first (P0).
3. Work through leaf lines and map each to the new plugin's API.
4. Where a leaf cannot be satisfied, add an exception or revise the leaf with the new behavior.
5. Do not update contract lines just to match what the new plugin does — contracts only change when you deliberately want to change your workflow.

What does NOT belong in BEHAVIOR.md

• Plugin names, function names, or API calls (those belong in the plugin module or AGENTS.md)
• Installation or configuration instructions (those belong in AGENTS.md or the Nix config)
• Exhaustive lists of every single keymap — only document bindings that represent deliberate workflow choices worth preserving
• Editor settings, color schemes, or non-behavioral preferences