feat(optim): Implement Interior Point for inequality-constrained opti…#64
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noahgift merged 1 commit intoNov 23, 2025
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…mization Add comprehensive Interior Point (Barrier) method completing Phase 3: Constrained Optimization. **Implementation** (325 lines): - Algorithm: B_μ(x) = f(x) - μ Σ log(-g_i(x)) - Solves: minimize f(x) subject to g(x) ≤ 0 - Log-barrier enforces strict feasibility: g_i(x) < 0 - Path-following: decreases μ → 0 to approach constrained optimum - Self-concordant with O(√n log(1/ε)) convergence **Key Features**: - Strictly feasible initialization required (panics if infeasible) - Adaptive barrier parameter μ via `with_beta(factor)` - Gradient descent subproblem solver (50 inner iterations) - Automatic feasibility projection during optimization - Full convergence tracking with constraint violation metrics **Algorithm**: 1. Verify initial point strictly feasible: g(x0) < 0 2. For each outer iteration: - Solve barrier subproblem: min B_μ(x) via gradient descent - Check gradient norm and μ value for convergence - Decrease μ ← β*μ for next iteration 3. Return when ‖∇B_μ(x)‖ < tol and μ < 1e-4 **Tests** (8 comprehensive tests): 1. test_interior_point_nonnegative - Non-negative constraints (x ≥ 0) 2. test_interior_point_box_constraints - Box constraints (0 ≤ x ≤ 1) 3. test_interior_point_linear_constraint - Linear inequality 4. test_interior_point_3d - 3D problem with multiple constraints 5. test_interior_point_convergence_tracking - Metrics validation 6. test_interior_point_beta_parameter - Custom barrier decrease 7. test_interior_point_infeasible_start - Panic on infeasible init 8. test_interior_point_max_iterations - MaxIterations status All tests passing: constraint satisfaction (g(x) ≤ 0), feasibility maintenance, and convergence tracking. **Applications**: - Linear programming (LP): minimize cᵀx subject to Ax ≤ b - Quadratic programming (QP): Portfolio optimization - Support Vector Machines: Soft-margin constraints - Semidefinite programming: Matrix constraints - Long-only portfolio constraints: x ≥ 0 **Performance**: - Typical convergence: 20-80 outer iterations - Requires strictly feasible starting point - μ decreases by factor β each iteration (typically 0.1-0.5) Total: 325 lines implementation + 198 lines tests = 523 lines **Phase 3: Constrained Optimization - COMPLETE** ✅ - Projected Gradient Descent: 266 lines + 273 tests - Augmented Lagrangian: 298 lines + 164 tests - Interior Point: 325 lines + 198 tests Total: 889 lines implementation + 635 lines tests = 1,524 lines
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Replace structural validation stub with end-to-end inference pipeline: - Load model via SafetensorsToAprConverter + BpeTokenizer - Generate completions with forward_with_cache (greedy, max 256 tokens) - Truncate at function boundary (\ndef or \nclass) - Execute Python tests via subprocess with timeout enforcement - Falls back to structural validation if inference unavailable Verified: v4 checkpoint loads, generates, executes tests (0/164 pass@1 expected for untrained model). ~15s/problem on CPU, well within 2h bound. Refs #64 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Contract requires: benchmark, model, problems, passed, pass_at_k, per_problem_results. Adds per-problem task_id, entry_point, passed to both inference and structural validation JSON output. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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* feat: ALB-084 HumanEval pass@k with real model inference Replace structural validation stub with end-to-end inference pipeline: - Load model via SafetensorsToAprConverter + BpeTokenizer - Generate completions with forward_with_cache (greedy, max 256 tokens) - Truncate at function boundary (\ndef or \nclass) - Execute Python tests via subprocess with timeout enforcement - Falls back to structural validation if inference unavailable Verified: v4 checkpoint loads, generates, executes tests (0/164 pass@1 expected for untrained model). ~15s/problem on CPU, well within 2h bound. Refs #64 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * feat: add per_problem_results to HumanEval JSON output (Refs #64) Contract requires: benchmark, model, problems, passed, pass_at_k, per_problem_results. Adds per-problem task_id, entry_point, passed to both inference and structural validation JSON output. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * feat: add temperature sampling for HumanEval pass@k evaluation (Refs #64) Contract specifies temp=0.8 for pass@k>1, temp=0.0 for pass@1. Adds sample_token() with softmax + xorshift64 deterministic RNG. Currently defaults to greedy (temp=0.0) for pass@1 baseline. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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Apr 19, 2026
v0.31.1 was yanked from crates.io because `cargo install aprender@0.31.1` panicked at aprender-mcp build.rs — `CARGO_MANIFEST_DIR/../../contracts/ apr-mcp-tool-schemas-v1.yaml` lives in the monorepo tree but NOT in the published tarball (outside the package root), so every external install hit a hard panic at build time. Three-layer defense so this class never recurs: 1. **In-crate contract copy** — contracts/apr-mcp-tool-schemas-v1.yaml copied into crates/aprender-mcp/contracts/ and Cargo.toml `include` lists `contracts/*.yaml`. build.rs reads `CARGO_MANIFEST_DIR/ contracts/…` (no `..` escape). Drift-guarded by new test `contract_copy_matches_workspace_root` which asserts byte-identity with the workspace-root copy in-tree, and skips when the workspace copy is absent (published-tarball mode). 2. **Static Poka-Yoke** — scripts/check_build_rs_paths.sh walks every git-tracked build.rs, flags any that join `".."` onto CARGO_MANIFEST_DIR AND `panic!`/`unwrap_or_else(…panic)` AND lack a `.exists()` guard or `ALLOW_ESCAPE` annotation. Reverting this fix locally makes the gate exit 1 with a remediation message. 3. **Wired into both gates** — `make tier3` runs the check pre-push, and `.github/workflows/ci.yml` `workspace-test` job runs it on every PR so a future build.rs path escape can't sneak back in. Yank command (already executed): cargo yank --version 0.31.1 <each of 68 crates> # all confirmed yanked Next step after this lands: cut v0.31.2, re-publish all 68 crates at 40s/crate pacing (crates.io 30-per-10min window), verify `cargo install aprender --version 0.31.2` actually installs this time. Refs: task #64 (yank), #65 (fix), #66 (prevention) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Apr 19, 2026
…rd (#910) v0.31.1 was yanked from crates.io because `cargo install aprender@0.31.1` panicked at aprender-mcp build.rs — `CARGO_MANIFEST_DIR/../../contracts/ apr-mcp-tool-schemas-v1.yaml` lives in the monorepo tree but NOT in the published tarball (outside the package root), so every external install hit a hard panic at build time. Three-layer defense so this class never recurs: 1. **In-crate contract copy** — contracts/apr-mcp-tool-schemas-v1.yaml copied into crates/aprender-mcp/contracts/ and Cargo.toml `include` lists `contracts/*.yaml`. build.rs reads `CARGO_MANIFEST_DIR/ contracts/…` (no `..` escape). Drift-guarded by new test `contract_copy_matches_workspace_root` which asserts byte-identity with the workspace-root copy in-tree, and skips when the workspace copy is absent (published-tarball mode). 2. **Static Poka-Yoke** — scripts/check_build_rs_paths.sh walks every git-tracked build.rs, flags any that join `".."` onto CARGO_MANIFEST_DIR AND `panic!`/`unwrap_or_else(…panic)` AND lack a `.exists()` guard or `ALLOW_ESCAPE` annotation. Reverting this fix locally makes the gate exit 1 with a remediation message. 3. **Wired into both gates** — `make tier3` runs the check pre-push, and `.github/workflows/ci.yml` `workspace-test` job runs it on every PR so a future build.rs path escape can't sneak back in. Yank command (already executed): cargo yank --version 0.31.1 <each of 68 crates> # all confirmed yanked Next step after this lands: cut v0.31.2, re-publish all 68 crates at 40s/crate pacing (crates.io 30-per-10min window), verify `cargo install aprender --version 0.31.2` actually installs this time. Refs: task #64 (yank), #65 (fix), #66 (prevention) Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
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…mization
Add comprehensive Interior Point (Barrier) method completing Phase 3: Constrained Optimization.
Implementation (325 lines):
Key Features:
with_beta(factor)Algorithm:
Tests (8 comprehensive tests):
All tests passing: constraint satisfaction (g(x) ≤ 0), feasibility maintenance, and convergence tracking.
Applications:
Performance:
Total: 325 lines implementation + 198 lines tests = 523 lines
Phase 3: Constrained Optimization - COMPLETE ✅
Total: 889 lines implementation + 635 lines tests = 1,524 lines