feat: add portable optimize workflow for MCMC sampler optimization

[xukai92]

Closes the optimize workflow task from the approved strategy spec.

Changes

• Added .factory/workflows/optimize.py — an 18-node portable workflow DAG for single-function MCMC sampler optimization:
  • Precondition check (FnNode): validates --focus function exists in Reference/Reference.jl
  • Parallel research (3 AgentNodes): semantics, conventions, and Julia perf researchers via fork/join
  • Research gate (GateNode/CEO): reviews research quality with RELOOP to fork_research
  • Strategist (AgentNode): synthesizes research into prioritized optimization strategy
  • Strategy gate (GateNode/USER): user approval before implementation
  • Builder (AgentNode, max_iterations=3): implements optimizations with RELOOP from QA gate
  • Build gate (GateNode/CEO): verifies builder output
  • Parallel QA (3 FnNodes): conformance replay, test suite, benchmark via fork/join
  • QA gate (GateNode/fn): deterministic check with RELOOP to builder (max 3)
  • Archivist (AgentNode, async): records optimization results
• Added tests/test_workflow_optimize.py with 24 tests covering:
  • Graph validation (no orphans, no unreachable nodes)
  • Trigger function (requires mode='optimize' + focus)
  • RELOOP edges (gate_qa→builder, gate_build→builder, gate_research→fork_research)
  • Node count (18) and type assertions
  • Fork/join consistency (research and QA)
  • Sacred constraints in builder prompt
• Workflow is auto-discovered by WorkflowRegistry as a project-local workflow
• Requires --mode optimize --focus <function_name> to activate

[github-actions]

Sentrux Quality Report

Absolute

Scanning ....
[scan] git ls-files: 628 total, 614 kept, 14 dropped (ext:14, meta:0, big:0)
[build_project_map] 614 files, 110 unique dirs, 101 cache misses, 5.3ms
[resolve] 1163 resolved, 1576 unresolved (of 2739 total specs)
[resolve_imports] project_map 5.4ms, suffix_idx 1.0ms, suffix_resolve 18.7ms, total 25.1ms
[build_graphs] 614 files | maps 2.2ms, imports 25.3ms, calls+inherit 6.0ms, total 33.4ms | 1162 import, 8414 call, 1 inherit edges
sentrux check — 3 rules checked

Quality: 4448

✗ [Error] max_cc: 6 function(s) exceed max cyclomatic complexity of 30
    factory/cli/_ceo_helpers.py:_validate_ceo_flags (cc=43)
    factory/cli/_ceo_helpers.py:_execute_ceo (cc=43)
    examples/chess_evolve.py:main (cc=33)
    factory/cli/_task_builder.py:_build_ceo_task (cc=32)
    factory/cli/run.py:cmd_run (cc=32)
    factory/outer_loop/mutations.py:validate_and_repair (cc=31)

✗ 1 violation(s) found

Diff (vs base branch)

Scanning ....
[scan] git ls-files: 628 total, 614 kept, 14 dropped (ext:14, meta:0, big:0)
[build_project_map] 614 files, 110 unique dirs, 101 cache misses, 5.4ms
[resolve] 1163 resolved, 1576 unresolved (of 2739 total specs)
[resolve_imports] project_map 5.5ms, suffix_idx 1.0ms, suffix_resolve 18.5ms, total 25.0ms
[build_graphs] 614 files | maps 2.3ms, imports 25.2ms, calls+inherit 5.8ms, total 33.2ms | 1162 import, 8414 call, 1 inherit edges
sentrux gate — structural regression check

Quality:      4448 -> 4448
Coupling:     0.80 → 0.80
Cycles:       4 → 4
God files:    3 → 3

Distance from Main Sequence: 0.35

✓ No degradation detected

[xukai92]

Workflow deployed as portable file to mcmc-lean instead.