fix(omp): recognize rule composer shape

CHANGELOG.md

@@ -40,6 +40,7 @@ PATH. Details and rollback: [`docs/upgrading.md`](./docs/upgrading.md) → *Upgr
 
 ### Fixed
 
+- OMP replies no longer stall when `composer.shape` is `rule`: Collie now recognizes the top-rule composer, recovers single-line and wrapped drafts, excludes inline suggestions, and prompt-binds the destructive clear before submitting.
 - `pack update --path '~/…'` expands the tilde on the remote's own `$HOME`, not this machine's.
 - `pack update --host` remembers the ssh route as soon as the probe proves it, not only after a
   fully successful run.

web/src/fixtures/panes/README.md

@@ -350,6 +350,35 @@ transcript above the dialog" is not available as corroborating evidence the way
 omp's `agent_status` stays `idle` while a picker is up; only the `ask` tool flips it to `blocked`.
 **Nothing may gate on `blocked`.**
 
+## OMP 18.1.10 rule composer corpus (captured 2026-09-05, sandbox pane)
+
+Three byte-faithful `pane.read format:ansi` captures from a throwaway Herdr pane in a generic git
+sandbox, with OMP 18.1.10 launched under an isolated `composer.shape: rule` config overlay. No
+substitution was needed: the visible cwd is the generic `…ie-rule-sandbox`, the draft text is
+synthetic, and the files contain no account, host, home-directory, session, credential-shaped string
+or UUID. All three are CRLF throughout with no trailing newline; their `wc -l` counts are 28, 28 and
+32 respectively.
+
+This shape has no bottom border. Its OMP-local scanner (`harness/omp/rule.ts`) therefore accepts only
+the complete renderer choreography at the pane tail: a top rule directly adjacent to `❯`, at most
+100 two-space continuation rows, exactly one blank gap, then one standalone status row as the final
+non-blank row. The OMP modal corpus and every Claude, Codex and Grok fixture are rejection cohorts;
+the adapter conformance suite requires `composerReady` and its prompt binding to decline them.
+Nothing is shared with the Claude harness beyond independently recognizing similar glyph geometry.
+
+| Fixture | State / what's in it | Herdr status |
+|---|---|---|
+| `omp--v18-rule-idle.txt` | Empty `❯` row below the top rule, one blank gap, then the standalone status row | `idle` |
+| `omp--v18-rule-draft.txt` | The same tail with `COLLIE_RULE_DRAFT` stranded on its single prompt row | `idle` |
+| `omp--v18-rule-wrapped.txt` | A five-row wrapped draft whose final `s` is a styled inline suggestion, not part of the input buffer | `idle` |
+
+Live verification drove this checkout's real Collie UI against the same OMP 18.1.10 sandbox. With
+`COLLIE_RULE_18110_STALE` stranded in the rule composer, the guard bound the clear to that exact
+prompt, typed `COLLIE_RULE_18110_LIVE_ACK` with `submit:false`, read the pane back, then issued the
+empty `submit:true`; the pane rendered the exact marker and not the stale prefix. With `/model` open,
+the UI retained `COLLIE_RULE_18110_MODAL_GUARD`, offered the explicit override, sent no `/reply` or
+`/keys` write, and left the modal unchanged.
+
 ## Lessons already encoded here (don't re-learn them)
 
 - **Match on parsed text, not raw bytes**: SGR codes sit *between* glyphs (`❯` and `1.` are in

web/src/fixtures/panes/omp--v18-rule-draft.txt

@@ -0,0 +1,28 @@
+
+╭─── omp v18.1.10 ────────────────────────────────────────╮
+│                   │ Tips                                │
+│   Welcome back!   │ # for prompt actions                │
+│                   │ / for commands                      │
+│   ████████████    │ ! to run bash                       │
+│      ██  ██       │ $ to run python                     │
+│      ██  ██       │ ─────────────────────────────────── │
+│      ▒▒  ██       │ LSP Servers                         │
+│          ██       │ No LSP servers                      │
+│                   │                                     │
+│    GPT-6-Astra    │                                     │
+│   openai-codex    │                                     │
+│                   │ ─────────────────────────────────── │
+│                   │ Recent sessions                     │
+│                   │ No recent sessions                  │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+╰───────────────────┴─────────────────────────────────────╯
+ Tip: Try task isolation to create CoW worktrees
+
+
+─────────────────────────────────────────────────────────────
+❯ COLLIE_RULE_DRAFT                                          
+
+ 󰵗  · 󰪣 GPT-6-Astra ·  …ie-rule-sandbox ·  6.3%/272K 󰁨 · 󰙺 

web/src/fixtures/panes/omp--v18-rule-idle.txt

@@ -0,0 +1,28 @@
+
+╭─── omp v18.1.10 ────────────────────────────────────────╮
+│                   │ Tips                                │
+│   Welcome back!   │ # for prompt actions                │
+│                   │ / for commands                      │
+│   ████████████    │ ! to run bash                       │
+│      ██  ██       │ $ to run python                     │
+│      ██  ██       │ ─────────────────────────────────── │
+│      ▒▒  ██       │ LSP Servers                         │
+│          ██       │ No LSP servers                      │
+│                   │                                     │
+│    GPT-6-Astra    │                                     │
+│   openai-codex    │                                     │
+│                   │ ─────────────────────────────────── │
+│                   │ Recent sessions                     │
+│                   │ No recent sessions                  │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+╰───────────────────┴─────────────────────────────────────╯
+ Tip: Try task isolation to create CoW worktrees
+
+
+─────────────────────────────────────────────────────────────
+❯                                                            
+
+ 󰵗  · 󰪣 GPT-6-Astra ·  …ie-rule-sandbox ·  6.3%/272K 󰁨 · 󰙺 

web/src/fixtures/panes/omp--v18-rule-wrapped.txt

@@ -0,0 +1,32 @@
+
+╭─── omp v18.1.10 ────────────────────────────────────────╮
+│                   │ Tips                                │
+│   Welcome back!   │ # for prompt actions                │
+│                   │ / for commands                      │
+│   ████████████    │ ! to run bash                       │
+│      ██  ██       │ $ to run python                     │
+│      ██  ██       │ ─────────────────────────────────── │
+│      ▒▒  ██       │ LSP Servers                         │
+│          ██       │ No LSP servers                      │
+│                   │                                     │
+│    GPT-6-Astra    │                                     │
+│   openai-codex    │                                     │
+│                   │ ─────────────────────────────────── │
+│                   │ Recent sessions                     │
+│                   │ No recent sessions                  │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+│                   │                                     │
+╰───────────────────┴─────────────────────────────────────╯
+ Tip: Try task isolation to create CoW worktrees
+
+
+─────────────────────────────────────────────────────────────
+❯ alpha beta gamma delta epsilon zeta eta theta iota kappa   
+  lambda mu nu xi omicron pi rho sigma tau upsilon phi chi   
+  psi omega alpha beta gamma delta epsilon zeta eta theta    
+  iota kappa lambda mu nu xi omicron pi rho sigma tau upsilon
+  phi chi psi omegas                                         
+
+ 󰵗  · 󰪣 GPT-6-Astra ·  …ie-rule-sandbox ·  6.3%/272K 󰁨 · 󰙺