Pattern Lifecycle

MUR v2 has a complete lifecycle system that automatically promotes, demotes, and cleans up patterns based on real usage.

Overview

                    mur evolve
                        │
  ┌─────────┐     ┌─────────┐     ┌─────────┐     ┌───────────┐
  │  Draft  │ ──► │Emerging │ ──► │ Stable  │ ──► │ Canonical │
  └─────────┘     └─────────┘     └─────────┘     └───────────┘
       │               │               │
       └───────────────┴───────────────┘
                    decay / demotion

Evolve

Run the lifecycle engine to evaluate all patterns:

mur evolve

This:

Applies exponential decay based on tier half-lives
Promotes patterns with strong feedback and usage
Demotes patterns that haven't been used

Preview changes first:

mur evolve --dry-run

Emergence Detection

MUR can detect emergent patterns — recurring themes across sessions that you haven't explicitly captured:

mur emerge

This uses behavior fingerprinting + Jaccard clustering to find cross-session similarities. Patterns that appear in 3+ sessions (configurable) are surfaced as candidates.

# Require at least 5 sessions
mur emerge --threshold 5

# Preview without creating
mur emerge --dry-run

Garbage Collection

Remove patterns that have decayed below the quality threshold:

mur gc

Interactive by default — shows what would be archived and asks for confirmation:

# Auto-archive without prompting
mur gc --auto

Composition Suggestions

MUR tracks pattern co-occurrence and can suggest:

Composition — Patterns that are always used together → combine into a workflow
Decomposition — Patterns that are too broad → split into focused patterns

mur suggest

# Auto-create suggestions as drafts
mur suggest --create

Manual Lifecycle Controls

Command	Effect
`mur pin <name>`	Skip decay — pattern persists indefinitely
`mur mute <name>`	Skip injection — pattern stays but isn't used
`mur boost <name>`	Increase importance by 0.1
`mur promote <name>`	Move to higher tier (project/core)
`mur deprecate <name>`	Mark as deprecated

Feedback Loop

The lifecycle is driven by feedback:

# After a helpful injection
mur feedback helpful swift-testing-macro

# After an unhelpful injection
mur feedback unhelpful old-convention

# Auto-analyze last session for contradictions
mur feedback auto

Contradiction detection works in both English and Chinese.