docs(docs): update ctrl‑a keybinding docs to use omp‑session and add omp‑session script description

docs/shell/fish.mdx

@@ -186,7 +186,7 @@ The header comment says the file should stay empty, but it holds the following:
 | <kbd>ctrl-y</kbd> | `clip-last`: re-run the last command and copy its output |
 | <kbd>ctrl-o</kbd> | `_gho_bind`: `gho` (pick a ghq repo or Obsidian vault from the `ghq-repos` cable and cd into it), then repaint |
 | <kbd>ctrl-p</kbd> | `_pj_bind`: `pj`, the task runner on the `pj` cable ([Scripts](/shell/scripts#pj)), then repaint |
-| <kbd>ctrl-a</kbd> | `_agents_bind`: pick an installed AI agent from the `agents` cable and start its TUI ([television](/tools/television#agents)), then repaint |
+| <kbd>ctrl-a</kbd> | `omp-session`, then repaint: resume or start omp for the current repo by branch and session age, opening the `omp-sessions` cable only when nothing qualifies ([Scripts](/shell/scripts#omp-session)) |
 | <kbd>ctrl-w</kbd> | `atuin ai inline`: natural-language command overlay |
 | <kbd>ctrl-g</kbd> | `lazygit` |
 | <kbd>down</kbd> | `_pj_bind_down`: opens the `pj` cable on an idle, empty prompt, otherwise fish's `down-or-search` |
@@ -211,7 +211,8 @@ The pickers run `tv --inline`, which opens on the line below the prompt and leav
 | `_tv_inline ARGS` | `tv ARGS --inline` | `\033[A` (cursor up), returns tv's status |
 | `_gho_bind` | `gho` | `\033[A` if the cwd did not change; `\n` after a cd, so the prompt lands below onefetch |
 | `_pj_bind [--quiet]` | `pj` with `PJ_STATE` set to a temp file | `\033[A` for `open` (cancelled) or empty (no task sources); `\n` for `ran` (the task printed output) |
-| `_agents_bind` | `tv agents --inline` with `AGENTS_STATE` set to a temp file | `\033[A` unless the cable's `launch` action wrote `ran` (an agent started) |
+
+`omp-session` (<kbd>ctrl-a</kbd>) does its own `\033[A` when its `omp-sessions` picker is cancelled, so the binding only repaints.
 
 zsh and bash bind <kbd>ctrl-o</kbd>, <kbd>ctrl-e</kbd>, <kbd>ctrl-p</kbd>, <kbd>down</kbd>, and <kbd>ctrl-t</kbd> the same way ([bash and zsh](/shell/bash-zsh)). Inside television, <kbd>ctrl-e</kbd> runs the channel's `edit` action and <kbd>ctrl-h</kbd> its `goto_parent_dir` action (`television/config.toml`). The config and cables are on the [television](/tools/television) page.