73 Lessons Learn 150

Close-Lessons-Learn 150 Protocol

Goal

Capture durable learning from a solved problem and keep the Memory pipeline consistent.

When to use

Use this skill when:

• The user confirms a fix worked (e.g., "works", "fixed", "отлично").
• A non‑obvious bug or root cause was discovered.
• A recurring pattern should be turned into a protocol.
• New architectural insights emerge that should be documented in Project Architecture Quick Reference.

What are "Principles" (from AGENTS.md and MEMORY.md)

• Principle Scan (AGENTS.md): After every message, the agent analyzes whether the task/solution revealed a fundamental truth, protocol, or anti-pattern that is a general rule (not a one-off). If yes, it records a "Principles Detected" block (e.g. ## 🧠 Principles Detected with **[Name]**: [definition]).
• Principles in MEMORY.md: The section ## 🧠 Principles (Context Engineering) holds the curated map (Architecture Map, Coding Conventions, Domain Axioms, Anti-Patterns). Each Lesson has a Principle: field = one-sentence rule. When closing lessons, any Principles Detected during the session must also be persisted there.

Workflow

1. Read the active session log in .sessions/SESSION_[date]-[name].md for evidence, context, and any Principles Detected blocks (or "Followed Principles") from agent responses.
2. Open MEMORY.md (repo root).
3. Record Principles Detected: For each principle that was detected during the session (from session log or from the work just done):
   • If it is already captured as the Principle: of a new lesson below, do not duplicate.
   • If it is a standalone general rule (convention, axiom, or anti-pattern), add it to ## 🧠 Principles in the appropriate subsection (e.g. Coding Conventions, Domain Axioms, Anti-Patterns) as a new bullet: * **[Name]:** [Concise definition].
4. Append a new Lesson to ## 🆕 Lessons (Inbox) using this template:

### <YYYY-MM-DD> <Short title>
**Problem:** <what was broken>
**Attempts:** <what was tried, if any>
**Solution:** <what fixed it>
**Why it worked:** <causal explanation>
**Principle:** <one-sentence rule for the future>

5. If 3+ related lessons exist, create a Short‑Term entry:

   • Move the related lessons (or summarize them) into ## 🔄 Short-Term Memory.
   • Write a common pattern and an emerging principle.

6. If a principle is stable, promote it to ## 💎 Long-Term Memory as a protocol:

   • Format: Context → Protocol → Reasoning.

7. Review Project Architecture Quick Reference and enhance if needed:

   • Check if the lesson reveals new architectural insights (new directories, patterns, workflows)
   • Add missing directories, workspaces, or key patterns discovered during work
   • Update existing entries with new information or clarifications
   • Keep the reference current and comprehensive

Output expectations

• Report exactly what you recorded or moved.
• Report how many Principles Detected were recorded and where (Inbox lesson Principle: field vs. ## 🧠 Principles section).
• If you did not write a lesson, say why.
• If you updated the Project Architecture Quick Reference, specify what was added or modified.