AgencyZero Mega PR: Prompt Syntax, Codex control, and optimization

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This release integrates the published PromptSyntax Rust and TypeScript packages and moves the experimental Claude usage credential flow into agent-experimental.

Highlights:

• Advanced composer mode highlights and compiles Prompt Syntax, keeps control islands out of model-facing text, and resolves selected model bindings.
• Reverse-channel directives use the standalone Rust parser and render as recognized chat controls.
• agent-abstraction 0.4.6 fixes Codex writable project roots, prioritizes live follow-ups, and preserves message boundaries.
• Item lists remember expanded state, status markers cycle every stored state, and GitHub issues can be linked manually or through agency:issue.link.
• Quit warns only while work is live and offers wait or exit-now choices.
• Experimental Claude 7-day usage appears beside Codex telemetry and is refreshed from the Claude Code managed login.
• Usage percentages are bounded, context math is bounded, cost reset labels now match UTC storage, and likely cache misses receive conservative feedback.
• Prompt snapshots omit closed and merged PR history, cap large item and PR lists, and Task Manager no longer repeats the shared Prompt Syntax examples.
• Dev and test profiles avoid expensive debug symbol generation.

Validation:

• Frontend typecheck and lint pass.
• 276 frontend tests pass.
• Workspace all-feature Clippy passes with warnings denied.
• 127 Rust workspace tests pass.
• Standard and experimental macOS debug app bundles pass codesign verification with distinct bundle identifiers.
• Brave-only fixture verification confirmed Advanced control stripping, all eight item-state transitions, and GitHub issue rendering.
• Dependency tree contains neither OpenSSL nor AWS-LC.

Release:

• Version 0.1.59 is an isolated final commit so standard and experimental channels can build in parallel.

The local untracked review.md was not touched or included.