fix(synapse): context-tracker hardcoded to 200K — should read model context window dynamically

[LeandroMachadoAveiro]

Problem

The context-tracker.js module has maxContext: 200000 hardcoded as default. With Claude Opus 4.6 (1M context window), this causes premature bracket escalation:

Prompts	With 200K (current)	With 1M (correct)
50	32.5% → DEPLETED	91% → FRESH
100	10% → CRITICAL	82% → FRESH
133	0% → CRITICAL	76% → FRESH

Impact: Handoff warnings firing prematurely, unnecessary heavy token injection (2500 budget instead of 800), and false CRITICAL state when 80%+ context is still available.

Root Cause

context-tracker.js line 57:

const DEFAULTS = {
  avgTokensPerPrompt: 1500,
  maxContext: 200000, // ← hardcoded, doesn't reflect actual model
};

Fix Applied

1. Model registry in core-config.yaml

models:
  active: claude-opus-4-6
  registry:
    claude-opus-4-6:
      contextWindow: 1000000
      avgTokensPerPrompt: 1500
    claude-sonnet-4-6:
      contextWindow: 200000
      avgTokensPerPrompt: 1500
    claude-haiku-4-5:
      contextWindow: 200000
      avgTokensPerPrompt: 1200

2. context-tracker.js → getModelConfig()

New function reads models.active from core-config.yaml, resolves the contextWindow from the registry, and passes it to estimateContextPercent(). Features:

• Cached per process (read once, no I/O overhead)
• Graceful fallback to 200K default if config missing/malformed
• Backward-compatible — options parameter still allows override for tests
• resetModelConfigCache() exported for test cleanup

3. Version bump

context-tracker.js v1.0.0 → v1.1.0

Recommendation for Developers

1. Add the models section to your project's core-config.yaml
2. Set models.active to match your Claude Code model
3. When new models are released, add them to the registry

Files Changed

• .aiox-core/core-config.yaml — added models section
• .aiox-core/core/synapse/context/context-tracker.js — dynamic config reader

Commit

9dd94fb — fix(synapse): dynamic context window from model registry instead of hardcoded 200K

[github-actions]

Welcome to aiox-core! Thanks for opening your first issue.

What happens next?

• A maintainer will triage this and add appropriate labels
• We'll respond as soon as possible
• Feel free to join Community Discussions

Helpful Resources:

• Contributing Guide
• Documentation

Looking to contribute? Check issues labeled community: good first issue.