chore: release v3.25.0 - Multi-corpus convergence milestone

All three external corpus targets now met:
- Tier 1 (stdlib): 92.7% (target 80%)
- Tier 2 (typed-cli): 62.5% (target 60%)
- Tier 5 (algorithms): 47.5% (target 40%)
- Internal examples: 80% (256/320)

Seven text-level post-processing fixes in iter17:
1. Multi-line Result signature detection
2. Generic function name extraction
3. find_call_close_paren for nested calls
4. Ok(!fname( pattern support
5. fix_trailing_comma_in_arith_parens
6. fix_immutable_ref_to_mut
7. fix_regex_match_string_arg

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: noahgift

CHANGELOG.md

@@ -2,6 +2,61 @@
 
 All notable changes to this project will be documented in this file.
 
+## [3.25.0] - 2026-02-02
+
+### 🎯 Multi-Corpus Convergence Milestone
+
+**All three external corpus targets now met!**
+
+This release marks a major milestone in the multi-corpus convergence campaign:
+
+| Corpus | Compile Rate | Target | Status |
+|--------|--------------|--------|--------|
+| Tier 1 (stdlib) | 92.7% (38/41) | 80% | ✅ +12.7 pp |
+| Tier 2 (typed-cli) | 62.5% (10/16) | 60% | ✅ +2.5 pp |
+| Tier 5 (algorithms) | 47.5% (48/101) | 40% | ✅ +7.5 pp |
+| Internal examples | 80% (256/320) | 80% | ✅ Met |
+
+### 🔧 Text-Level Post-Processing Fixes (iter17)
+
+Seven new text-level fixes in `rust_gen.rs` that improved Tier 5 from 26% to 47.5%:
+
+1. **Multi-line Result signature detection** (`has_result_return_multiline`)
+   - Scans 5 lines after `fn` declaration for `-> Result<`
+   - Fixes files like `merge_sort.py` with multi-line function signatures
+
+2. **Generic function name extraction**
+   - Strips `<'a, T>` from names like `_merge<'b, 'a>`
+   - Enables proper Result double-wrap detection
+
+3. **`find_call_close_paren` for nested calls**
+   - Balanced parenthesis tracking for complex expressions
+   - Handles `Ok(nested(complex(args)))`
+
+4. **`Ok(!fname(` pattern support**
+   - Logical negation in Result-returning calls
+
+5. **`fix_trailing_comma_in_arith_parens`**
+   - Removes spurious trailing commas: `(expr,)` → `(expr)`
+   - Prevents tuple coercion in arithmetic expressions
+
+6. **`fix_immutable_ref_to_mut`**
+   - `&var` → `&mut var` at call sites when callee needs mutable ref
+
+7. **`fix_regex_match_string_arg`**
+   - Removes `.to_string()` where `&str` expected in `DepylerRegexMatch::new()`
+
+### 📊 Quality Metrics
+
+- **Clippy**: Zero warnings
+- **Tests**: All passing
+- **TDG Grade**: B+ (on track for A+)
+
+### 🔗 Links
+
+- Specification: `docs/specifications/improve-converge.md`
+- Corpus locations documented in spec
+
 ## [3.22.0] - 2025-01-18
 
 ### 🎯 Hero Example Achievement

Cargo.toml

@@ -37,7 +37,7 @@ max_cyclomatic_complexity = 15
 required_documentation_coverage = 100.0
 
 [workspace.package]
-version = "3.24.0"
+version = "3.25.0"
 edition = "2021"
 authors = ["Depyler Contributors"]
 license = "MIT OR Apache-2.0"

crates/depyler/Cargo.toml

@@ -33,7 +33,7 @@ depyler-annotations = { version = "3.23.0", path = "../depyler-annotations" }
 depyler-quality = { version = "3.23.0", path = "../depyler-quality" }
 depyler-oracle = { version = "3.23.0", path = "../depyler-oracle" }
 depyler-graph = { version = "3.23.0", path = "../depyler-graph" }
-depyler-corpus = { version = "3.24.0", path = "../depyler-corpus" }
+depyler-corpus = { version = "3.25.0", path = "../depyler-corpus" }
 entrenar = "0.5"
 alimentar = { version = "0.2.2", default-features = false, features = ["local"] }
 arrow = { version = "54", default-features = false, features = ["json"] }