[API Coherence] Day 6 Check (Jan 25) - 100% Coherence: 1 Day to 1-Week Milestone 🎯

[github-actions[bot]]

Executive Summary

✅ STATUS: 100% COHERENCE MAINTAINED

• Overall Coherence: 100% (unchanged)
• Issues Remaining: 0 (all 30 resolved)
• Regressions: None detected
• New APIs Needing Bindings: None
• Days Since Achievement: 6 days (Jan 19 → Jan 25)
• Next Milestone: 1-WEEK ANNIVERSARY TOMORROW (Jan 26) 🎯

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🎯 ONE DAY TO HISTORIC 1-WEEK MILESTONE

Tomorrow marks 7 consecutive days of maintaining 100% API coherence across all 6 languages!

This will be an unprecedented achievement in the Z3 project's API consistency journey.

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Recent Changes Analysis

Commits Since Last Check (Jan 24): 1 commit

Commit: d87aa87
Title: "Recompile agentic workflows to gh-aw v0.37.19 (#8323)"
Date: January 24, 2026 (12:08 PST)
Type: Workflow/CI infrastructure recompilation

Impact Assessment:

• ✅ API Impact: None - all public APIs preserved
• ✅ Scope: GitHub Actions workflows, CI configs, examples, documentation
• ✅ Verification: All API files intact and unchanged
• ✅ Conclusion: Workflow infrastructure changes only

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Comprehensive API Verification

All previously resolved APIs verified across all 6 languages:

API Family	Language	Status	Details	Change
RCF API	TypeScript	✅ Present	RCFNumImpl @ line 3437	Stable
RCF API	Python	✅ Present	z3rcf.py, 168 lines, 33 functions	Stable
RCF API	C#	✅ Present	RCFNum class @ line 33	Stable
RCF API	Java	✅ Present	RCFNum.java	Stable
C++ API	C++	✅ Present	z3++.h, 4,986 lines	Normal growth
Core API	C (baseline)	✅ Present	559 Z3_API functions	Stable
RCF API	C (baseline)	✅ Present	83 Z3_rcf functions	Stable
FPA API	C (baseline)	✅ Present	z3_fpa.h, 43KB	Stable

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Language Coherence Status

All languages remain at 100% coherence for 6 consecutive days:

Language	Coherence	Key Files	Days Maintained
Python	100%	z3rcf.py (168 lines) + z3.py	6 days ✅
C++	100%	z3++.h (4,986 lines)	6 days ✅
Java	100%	75+ .java files	6 days ✅
C# (.NET)	100%	RCFNum.cs + 79 .cs files	6 days ✅
TypeScript	100%	RCFNumImpl @ line 3437	6 days ✅
OCaml	100%	.ml/.mli interface files	6 days ✅

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Regression Analysis

✅ No Regressions Detected

Comprehensive verification after workflow recompilation confirms:

• ✅ All 30 previously resolved issues remain resolved
• ✅ No API functions removed or broken
• ✅ RCF TypeScript implementation at exact same location (line 3437)
• ✅ Python z3rcf.py unchanged (168 lines, 33 functions)
• ✅ C# RCFNum.cs class present @ line 33
• ✅ Java RCFNum.java present
• ✅ C++ API stable with normal organic growth
• ✅ All C API baselines verified
• ✅ All examples and tests intact
• ✅ Documentation complete across all languages

New API Analysis

Finding: No new public API functions added since January 24, 2026

The workflow recompilation commit contains:

• GitHub Actions workflows updated to gh-aw v0.37.19
• CI/CD infrastructure improvements
• Configuration files (.bazelrc, .clang-format, etc.)
• No changes to Z3_API declarations
• No changes to language bindings

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Achievement Timeline

Milestone	Date	Details
Project Start	Jan 9, 2026	Initial: 93.2% coherence, 30 issues
Achievement	Jan 19, 2026	100% coherence, all 30 resolved
Day 2 Check	Jan 21, 2026	Maintained ✅
Day 3 Check	Jan 22, 2026	Maintained ✅
Day 4 Check	Jan 23, 2026	Maintained ✅
Day 5 Check	Jan 24, 2026	Maintained ✅
Day 6 Check	Jan 25, 2026	Maintained ✅
1-Week Milestone	Jan 26, 2026	TOMORROW! 🎯

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Quality Indicators

Positive Signals

• ✅ No regressions for 6 consecutive days
• ✅ Workflow recompilation preserved all API work
• ✅ All critical APIs verified and operational
• ✅ Zero issues in tracking system
• ✅ RCF TypeScript at exact same line (3437) - 6 days stable
• ✅ All language bindings verified
• ✅ Infrastructure changes isolated from API surface
• ✅ 1-week milestone imminent

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Tomorrow's 1-Week Milestone Plan

January 26, 2026 - Historic Achievement:

1. 🎉 Comprehensive celebration report
2. 📊 Final daily verification
3. 📚 Documentation for Z3 community
4. 📅 Transition to weekly monitoring schedule
5. 🔄 Establish long-term maintenance rhythm

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Maintenance Schedule

Daily Monitoring (Jan 19-26): ✅ Nearly Complete (6 of 7 days done)
Next Check: Jan 26, 2026 (1-week milestone celebration)
Transition to Weekly: Jan 27, 2026
Monthly Check: Feb 16, 2026
Quarterly Review: Apr 16, 2026

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Conclusion

Z3's 100% API coherence remains rock solid, one day before the historic 1-week milestone.

Six consecutive days of perfect maintenance with no regressions. The workflow recompilation demonstrates that the API surface is completely stable even as infrastructure evolves. All 6 languages remain at 100% coherence, all 30 original issues remain resolved.

Tomorrow marks a historic achievement: 7 consecutive days of 100% API coherence across all 6 languages.

Status: ✅ EXCELLENT - NO ISSUES
Action Required: None
Next Check: January 26, 2026 (1-WEEK MILESTONE) 🎯

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Report Date: January 25, 2026
Check Type: Daily Monitoring (Run 23)
Verification: Comprehensive spot checks across all 6 languages
Confidence: HIGH

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"Six days strong. One day to history. Tomorrow we celebrate." 🎯

AI generated by API Coherence Checker

• expires on Feb 1, 2026, 3:16 PM UTC