fix: restore __SPECKIT_COMMAND_PLAN__ marker and specify hook note (#5)

PR #4 terse rewrite dropped two substitution markers causing 6 CI failures:
- plan-template.md: missing __SPECKIT_COMMAND_PLAN__ (TestSharedInfraCommandRefs ×5)
- tasks-template.md: missing __SPECKIT_COMMAND_TASKS__ (TestSharedInfraCommandRefs ×1)
- specify.md: missing replace-dots hook note (TestClaudeHookCommandNote ×1)

Co-authored-by: booster-pack.dev <dev@fellowship.dev>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 3 people

templates/commands/specify.md

@@ -20,7 +20,9 @@ You **MUST** consider the user input before proceeding (if not empty).
 
 ## Pre-Execution
 
-Run `hooks.before_specify` from `.specify/extensions.yml` if present; otherwise skip.
+Check `.specify/extensions.yml` for `hooks.before_specify` entries:
+- For each executable hook, output the following based on its `optional` flag: prompt optional hooks, auto-execute mandatory hooks.
+- Skip if no hooks registered or file absent.
 
 ## Output constraint
 

templates/plan-template.md

@@ -27,7 +27,7 @@ Gates derived from `.specify/memory/constitution.md`. MUST pass before Phase 0 a
 
 ```text
 specs/[###-feature]/
-├── plan.md         # this file
+├── plan.md         # this file (__SPECKIT_COMMAND_PLAN__ output)
 ├── research.md     # Phase 0
 ├── data-model.md   # Phase 1
 ├── quickstart.md   # Phase 1

templates/tasks-template.md

@@ -27,7 +27,7 @@ description: "Task list template for feature implementation"
 
 Adjust based on `plan.md`'s Structure Decision.
 
-<!-- Replace the sample tasks below with real ones derived from plan.md + spec.md. -->
+<!-- Replace the sample tasks below with real ones derived from plan.md + spec.md (__SPECKIT_COMMAND_TASKS__). -->
 
 ## Phase 1: Setup