Merge pull request #1380 from Bantuson/feat/security-first-layer

feat: security-first enforcement layer with threat-model-anchored verification

commands/gsd/secure-phase.md

@@ -0,0 +1,35 @@
+---
+name: gsd:secure-phase
+description: Retroactively verify threat mitigations for a completed phase
+argument-hint: "[phase number]"
+allowed-tools:
+  - Read
+  - Write
+  - Edit
+  - Bash
+  - Glob
+  - Grep
+  - Task
+  - AskUserQuestion
+---
+<objective>
+Verify threat mitigations for a completed phase. Three states:
+- (A) SECURITY.md exists — audit and verify mitigations
+- (B) No SECURITY.md, PLAN.md with threat model exists — run from artifacts
+- (C) Phase not executed — exit with guidance
+
+Output: updated SECURITY.md.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/secure-phase.md
+</execution_context>
+
+<context>
+Phase: $ARGUMENTS — optional, defaults to last completed phase.
+</context>
+
+<process>
+Execute @~/.claude/get-shit-done/workflows/secure-phase.md.
+Preserve all workflow gates.
+</process>