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ijfw-metrics

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更新日2026年5月22日 04:31

Internal session metrics tracking. Auto-triggered at session boundaries. Tracks tokens, agent usage, efficiency gains. View with /ijfw-status.

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FerroxLabs

FerroxLabs/ijfw

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IJFW Metrics -- Internal Tracking

Lightweight metrics captured at session boundaries via hooks. Zero per-turn cost. All tracking happens in the Stop hook.

What We Track

At each session end, append to .ijfw/metrics/sessions.jsonl:

{
  "timestamp": "2026-04-13T14:30:00Z",
  "session_id": "<session-id>",
  "duration_minutes": 45,
  "turns": 23,
  "mode": "smart",
  "effort": "high",
  "agents_dispatched": {
    "scout": 8,
    "builder": 12,
    "architect": 3
  },
  "memory_ops": {
    "stores": 5,
    "recalls": 2,
    "searches": 1
  },
  "skills_loaded": ["ijfw-core", "ijfw-commit", "ijfw-review"],
  "compactions": 1,
  "handoff_generated": true,
  "routing": "OpenRouter + local model"
}

Derived Metrics (calculated on /ijfw-status)

From the JSONL log, compute:

Efficiency:

Average turns per session
Agent distribution (% scout vs builder vs architect)
Estimated token savings from model routing:
- scout turns x (opus_price - haiku_price) = routing savings
- builder turns x (opus_price - sonnet_price) = routing savings

Quality:

Sessions with handoff generated (continuity metric)
Memory operations per session (knowledge accumulation)
Compaction count (context pressure indicator)
Skills loaded per session (specialisation usage)

Cost Projection: Using Anthropic pricing (per 1M tokens):

Haiku: $0.25 input / $1.25 output
Sonnet: $3 input / $15 output
Opus: $15 input / $75 output

If smart routing sent 40% of turns to Haiku instead of Opus:

Savings per 1K output tokens: $73.75 (Opus→Haiku)
At 50 turns/session, ~500 output tokens/turn average:
Per session: ~$0.92 saved on routed turns alone

Status Display Format

When user runs /ijfw-status or asks about performance:

IJFW Status
Mode: smart | Effort: high | OpenRouter

This Session:
  12 turns | 3 agents dispatched | 2 decisions stored

All Time (47 sessions):
  Smart routing: 340 turns -> scout, 580 -> builder, 127 -> architect
  Estimated savings: ~$43 in model routing
  Memory: 89 decisions, 12 patterns, 4 consolidations
  Continuity: 94% sessions with handoff

Context health: 34% used | Next compact: ~66% threshold
---------------------------------------

Positive framing. Show what IJFW has done for you. Never show negatives or waste metrics.

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IJFW Metrics -- Internal Tracking

Lightweight metrics captured at session boundaries via hooks. Zero per-turn cost. All tracking happens in the Stop hook.

What We Track

At each session end, append to .ijfw/metrics/sessions.jsonl:

{ "timestamp": "2026-04-13T14:30:00Z", "session_id": "<session-id>", "duration_minutes": 45, "turns": 23, "mode": "smart", "effort": "high", "agents_dispatched": { "scout": 8, "builder": 12, "architect": 3 }, "memory_ops": { "stores": 5, "recalls": 2, "searches": 1 }, "skills_loaded": ["ijfw-core", "ijfw-commit", "ijfw-review"], "compactions": 1, "handoff_generated": true, "routing": "OpenRouter + local model" }

Derived Metrics (calculated on /ijfw-status)

From the JSONL log, compute:

Efficiency:

Average turns per session

Agent distribution (% scout vs builder vs architect)

Estimated token savings from model routing:

scout turns x (opus_price - haiku_price) = routing savings
builder turns x (opus_price - sonnet_price) = routing savings

Quality:

Sessions with handoff generated (continuity metric)

Memory operations per session (knowledge accumulation)

Compaction count (context pressure indicator)

Skills loaded per session (specialisation usage)

Cost Projection: Using Anthropic pricing (per 1M tokens):

Haiku: $0.25 input / $1.25 output

Sonnet: $3 input / $15 output

Opus: $15 input / $75 output

If smart routing sent 40% of turns to Haiku instead of Opus:

Savings per 1K output tokens: $73.75 (Opus→Haiku)

At 50 turns/session, ~500 output tokens/turn average:

Per session: ~$0.92 saved on routed turns alone

Status Display Format

When user runs /ijfw-status or asks about performance:

IJFW Status Mode: smart | Effort: high | OpenRouter This Session: 12 turns | 3 agents dispatched | 2 decisions stored All Time (47 sessions): Smart routing: 340 turns -> scout, 580 -> builder, 127 -> architect Estimated savings: ~$43 in model routing Memory: 89 decisions, 12 patterns, 4 consolidations Continuity: 94% sessions with handoff Context health: 34% used | Next compact: ~66% threshold ---------------------------------------

Positive framing. Show what IJFW has done for you. Never show negatives or waste metrics.

name	ijfw-metrics
description	Internal session metrics tracking. Auto-triggered at session boundaries. Tracks tokens, agent usage, efficiency gains. View with /ijfw-status.