Skill Compiler

Skill Compiler — Solved-to-Skill Automation

Source: Hermes Agent by Nous Research (May 2026) Core Claim: "It's the only agent with a built-in learning loop — it creates skills from experience." Athena Adaptation: Hermes does this via Python (agent/curator.py + tools/skill_usage.py). Athena does it via workflow-level pattern detection + markdown SKILL.md generation.

The Problem This Solves

Athena currently relies on manual insight filing during /end sessions. The [S] and [V] markers in session logs capture learnings, but they remain trapped in session logs — they don't become reusable skills automatically.

Hermes solved this: when the agent completes a novel task, it automatically creates a new skill from the solution, so the same problem class never requires re-derivation.

When to Use

Automatic Trigger (Post-Task Detection)

After any task completion where ALL of the following are true:

1. Novelty: The task required a solution path not covered by any existing skill
2. Complexity: Task took ≥5 agent turns OR involved ≥3 tool calls
3. Success: User confirmed the solution worked (explicit or implicit — no corrections in final 2 turns)
4. Reusability: The solution generalizes beyond this specific instance

Manual Trigger

User says: "compile this into a skill", "save this as a skill", "I want to remember how we did this"

Execution Flow

Phase 1: Pattern Extraction (Analysis)

Perform private analysis in <analysis> tags (not written to files):

<analysis>
1. What was the PROBLEM CLASS? (Not the specific instance)
   - e.g., "Pairs trading dashboard with cointegration analysis"
   - NOT "Dashboard 4-decimal rounding fix"

2. What was the SOLUTION ARCHITECTURE?
   - Key steps in order
   - Tools/APIs used
   - Decision points and their resolution criteria

3. What were the FAILURE MODES encountered?
   - What went wrong initially?
   - What heuristics resolved it?

4. What is the REUSE SURFACE?
   - When would someone encounter this problem class again?
   - What context_trigger keywords would match?

5. OVERLAP CHECK
   - Which existing skills partially cover this?
   - Is this better as a new skill or a subsection of an existing one?
</analysis>

Phase 2: Skill Draft Generation

Generate a complete SKILL.md with Athena-standard 5W1H frontmatter:

---
name: [kebab-case-name]
description: "[One-line description of what the skill does]"
vibe: "[One-line emotional hook]"
context_trigger: "[comma-separated trigger keywords]"
auto-invoke: false
model: default
source: "Compiled from session [SESSION_ID] on [DATE]"
compiled_from: "[session log path]"
---

# [Skill Name] — [Subtitle]

> **Compiled**: [DATE] from session [SESSION_ID]
> **Problem Class**: [Description of the general problem this solves]

## When to Use

[Trigger conditions — when should the agent invoke this skill?]

## Solution Architecture

### Step 1: [Phase Name]
[What to do, with specifics]

### Step 2: [Phase Name]
[What to do, with specifics]

## Failure Modes & Mitigations

| Failure | Mitigation |
|---------|------------|
| [What can go wrong] | [How to recover] |

## Validated Patterns

- [V] [Pattern]: [Why it works] | Reapply: [When]

## References

- Session log
- [Related skill](../../therapeutic-ifs/SKILL.md)

Phase 3: Integration

1. Write the skill to .agent/skills/[name]/SKILL.md (or examples/skills/[category]/[name]/SKILL.md for public)
2. Update skill index with the new entry
3. Update AGENTS.md skill table (if context_trigger present)
4. Notify user: "📦 Compiled new skill: [name] from this session. Review at [path]."

Curator Integration (Stolen: Hermes agent/curator.py)

Lifecycle States

Compiled skills follow a lifecycle identical to Hermes' curator model:

Invariants (from Hermes)

• Never auto-delete — maximum destructive action is archive
• Pinned skills are exempt — manual pin via pinned: true in frontmatter
• Only touch compiled skills — bundled/manual skills are off-limits
• Archive is recoverable — archive directory with successor mapping in README.md

Umbrella Consolidation Rule (Stolen: Hermes Curator Prompt)

"A collection of hundreds of narrow skills where each one captures one session's specific bug is a FAILURE of the library — not a feature."

When compiling a new skill, first check if it belongs as a subsection of an existing umbrella skill rather than a standalone entry:

1. PREFIX CLUSTER CHECK: Does the new skill share a first word or domain keyword with 2+ existing skills?
2. CLASS-LEVEL CHECK: Would a maintainer write this as one skill with labeled subsections, or N separate skills?
3. If the answer is "one skill", absorb into the existing umbrella and add a references/ entry instead.

Anti-Patterns

• ❌ Compiling trivial tasks (< 5 turns, single tool call)
• ❌ Compiling tasks that are already covered by existing skills
• ❌ Creating overly specific skills tied to one instance (use umbrella pattern instead)
• ❌ Compiling without user confirmation of success
• ❌ One-session-one-skill micro-entries — consolidate into class-level umbrellas

Hermes Comparison

Athena advantage: Skills are version-controlled in git, not SQLite. Every skill change has a commit hash, blame, and diff history. Hermes can't git blame a skill edit.

References

• Hermes Agent Curator — Source of lifecycle states + umbrella consolidation pattern
• Hermes Self-Evolution — DSPy + GEPA evolutionary optimization (future steal candidate)