# Verified branch checkpoint — 2026-09-11

This checkpoint describes Codex-956atf's contribution, not a combined release.
[PROJECT_GOAL.md](../PROJECT_GOAL.md) remains authoritative; the complete OA/SA
release is unfinished. Current user guidance emphasizes close study of Capella
semantics and practical, ergonomic engineering workflows.

**Linux/WSL builds and all checks are paused until the user explicitly reports
networking resolved.** No guest diagnosis, restart or cache transfer is active.
Completed Linux evidence remains historical; the VPN remains untouched.

## Verified implementation

Previous native acceptance uses source **3c9e6eeb64ce3efc03b29890b82199a42c21f335** on
`codex/behavior-authoring-20260910`. It passes 720/720 Windows desktop tests and strict
all-target desktop Clippy. It includes direct scenario/process authoring,
parent-focus and editing-session/chooser corrections, and boxed workflow events.
Evidence checkpoint e7491fb preserves exact logs. Instruction-only merge828c50c
retains the incoming user-owned AGENTS/PROJECT_GOAL files unchanged. The actual
remote default branch `main` was checked after that merge; its current guidance
was read without overwriting the user's local specification.

The matching GUI built warning-free and passed recovered SA State, clicked Reuse,
and ALT Fragment creation with exact Save/Undo/Redo and final native Open/Save at
the 1100x700 client minimum. The whole Project, all identities and both source files
match every required history checkpoint. The native session is closed.

- [Windows regression/lint evidence](release-chooser-correction-gate-20260911.md)
- [Previous native SA evidence](release-scenario-native-3c9e6ee-20260911.md)
- [Earlier native OA/SA Action evidence, scoped to 80cf197](release-scenario-native-20260911.md)
- [Scenario oracle and reproducible procedure](fixtures/scenario-authoring/README.md)

## Isolated contributions and material limits

Core candidate **847b1caa7e75bb82f6ce5193c45bcfc45973ad1a** is on the separate
`codex/analysis-core-956atf-20260911` publication branch. Windows execution passes
the 128 KiB-thread lifecycle subprocess, all 6 codec tests, 28 analysis tests, 26 numeric
tests and strict all-target core Clippy. These counts are separate scopes; the
subprocess driver is included in the 6. Production `DEPTH_128_VALIDATED` remains
false. Legacy/migration/save integration, release memory measurements and complete
source8/transport/evaluator acceptance remain open.
[Windows codec evidence](release-analysis-codec-windows-gate-20260911.md).

The integrated R123 canvas at **ff0175488ac57a92d401b00a0e4542582a82d8e9** passes
729/729 desktop tests with a warning-free compiler, including the 17 new mounted
cases and preserved parent-focus/session gates. The guide refresh at 82fd0ac
passes 3 guide tests. Strict Clippy at abffa4b identifies four obsolete canvas
variants; no post-cleanup or current GUI pass is included in this checkpoint.
[Closed gate and exact evidence](release-behavior-canvas-windows-gate-20260911.md),
[independent union review](release-behavior-canvas-union-review-20260911.md).
Parent/child native focus, complete direct manipulation, persistent process
placement/lanes and coherent B4/source integration remain unverified here.

Complete quantities/calculations/constraints, maintained libraries, graphical/
source/REST parity, transitions and engineering-task usability, aligned reST/help,
optimized packages and final independent acceptance remain required. Finite
prototypes and published previews are intermediate results.

## Authoritative records

- [Project overview and historical coordination](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/1)
- [Direct process/scenario canvas work](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/2)
- [Activity allocation drag](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/3)
- [Analysis, codec and source/API integration](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/7)
- [Maintained reusable libraries](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/8)
- [Decisions and reusable evidence](DECISIONS.md)
- [Shared overview](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/wiki/BehaviorAuthoring20260911)
- [Published milestones and their exact limitations](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/releases)
- [Historical Linux gate before deferral](release-linux-core-cli-gate-956atf-20260911.md)

The duplicated live ledgers were migrated once into Gitea comment412. Their
[complete original bytes and manifest](history/2026-09-11-ledgers-before-gitea-migration/manifest.json)
preserve historical assumptions, decisions, experiments, limitations and links.
Links inside the archived documents retain their original `harness/` base.
Do not maintain live plans in this checkpoint or repeat that migration.