ln-832-bundle-optimizer（ln 832 捆绑优化器）

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ln-832-bundle-optimizer

Type: L3 Worker Category: 8XX Optimization

Reduces JavaScript or TypeScript bundle size using keep/discard verification. JS/TS projects only.

Overview

Workflow

Phases: Pre-flight -> Baseline -> Analyze -> Optimize Loop -> Report

Phase 0: Pre-flight Checks

MANDATORY READ: Load shared/references/ci_tool_detection.md for build detection. MANDATORY READ: Load shared/references/mcp_tool_preferences.md and shared/references/mcp_integration_patterns.md

Use hex-graph first when hotspots or clone groups materially improve optimization targeting. Use hex-line first for local code and config reads when available. If MCP is unavailable, unsupported, or not indexed, continue with built-in Read/Grep/Glob/Bash and state the fallback in the summary.

Runtime Coordination

Managed runs receive deterministic runId and exact summaryArtifactPath from ln-830. Standalone runs remain supported; if runtime arguments are omitted, generate a standalone run-scoped artifact before returning.

Phase 1: Establish Baseline

1. Run the detected build command.
2. Measure total size of the output directory.
3. Record baseline bytes and per-chunk sizes.

Phase 2: Analyze Opportunities

Optimization categories:

Phase 3: Optimize Loop (Keep/Discard)

Per-optimization cycle:

FOR each optimization:
  1. APPLY the change
  2. BUILD
     IF build fails -> DISCARD and revert
  3. MEASURE new bundle size
  4. KEEP only if the bundle is smaller than the current baseline
  5. LOG the result

Stop conditions:

Optimization order:

1. remove unused dependencies
2. improve tree-shaking and imports
3. replace heavy libraries
4. introduce code splitting
5. optimize CSS

Phase 4: Report Results

Configuration

Options:
  build_command: ""             # Auto-detect
  output_dir: ""                # Auto-detect
  run_depcheck: true
  run_bundle_analyzer: false
  remove_unused_deps: true
  fix_tree_shaking: true
  replace_heavy_libraries: true
  enable_code_splitting: true

Error Handling

References

• optimization_categories.md
• shared/references/ci_tool_detection.md

Runtime Summary Artifact

MANDATORY READ: Load shared/references/coordinator_summary_contract.md

Emit a modernization-worker summary envelope.

Managed mode:

• ln-830 passes deterministic runId and exact summaryArtifactPath
• write the summary to the provided summaryArtifactPath

Standalone mode:

• omit runId and summaryArtifactPath
• write .hex-skills/runtime-artifacts/runs/{run_id}/modernization-worker/ln-832--{identifier}.json

Monitor (2.1.98+): For build commands in keep/discard loop expected >30s, use Monitor. Fallback: Bash(run_in_background=true).

Definition of Done

• Baseline bundle size established from real build output
• Optimization opportunities analyzed from bundle composition and project usage
• Each optimization evaluated with keep/discard verification
• Only size-reducing optimizations kept
• Final report captures bundle delta, discarded attempts, and removed dependencies
• modernization-worker summary artifact written to the managed or standalone path

Version: 1.0.0 Last Updated: 2026-03-08