governance: adopt TDD with full unit/integration tests; update system prompt and AGENTS templates\n\nplan: add TDD milestones and test coverage criteria; update proposal accordingly

docs/devlog/DEVLOG_HUMAN.md

@@ -170,3 +170,17 @@ Details:
 
 Next Steps:
 - Await plan review/approval; then start implementation.
+
+---
+
+Date: 2025-09-17 16:12 (UTC)
+
+Summary:
+- Incorporated TDD as a governance rule with full unit/integration tests for all features in this repo and generated projects.
+
+Details:
+- Updated `prompts/global/system.{md,llm.md}`, `meta/AGENTS.seed.*`, and `templates/project/_shared/AGENTS.md` to mandate TDD.
+- Amended the proposal and plan to include TDD milestones and test coverage acceptance criteria.
+
+Next Steps:
+- Execute the plan using TDD, starting with test harness setup and failing tests.

docs/devlog/DEVLOG_LLM.md

@@ -131,3 +131,11 @@ This log is concise and structured for quick machine parsing and summarization.
   - Added `collab/plan/01-codexhelper.md` and `.llm.md` with milestones, deliverables, and acceptance criteria
 - next:
   - Await plan review/approval; then implement per milestones
+
+## 2025-09-17T16:12Z
+- context: Governance update — adopt TDD and full unit tests across this repo and generated projects
+- actions:
+  - Updated global system prompt and seed/project AGENTS templates to encode TDD requirement
+  - Amended proposal and plan to include TDD milestones and acceptance criteria
+- next:
+  - Proceed with TDD in implementation; scaffold tests first