Icod.Terminal 0.13.0 — observable terminal color control

[uniblab]

Develops Icod.Terminal 0.13.0 from merged 0.12.0 mainline commit a59cdc2bbf09c3ad65481b69eaf100f4d128c96c.

Current development state

• VersionPrefix: 0.13.0
• VersionSuffix: alpha.8
• effective package version: 0.13.0-alpha.8
• assembly version: 0.13.0.0
• T130–T136 — complete and green
• T137 — implemented; exact-head validation pending

Theme

Observable terminal palette and dynamic-color control for future typed Icod.DCurses consumption.

Completed protocol scope

• OSC 4 / 104 — indexed palette mutation, observation, reset
• OSC 10 / 110 — default foreground
• OSC 11 / 111 — default background
• OSC 12 / 112 — text cursor
• OSC 13 / 113 — mouse foreground
• OSC 14 / 114 — mouse background
• OSC 17 / 117 — highlight background
• OSC 19 / 119 — highlight foreground

Tektronix OSC 15/16/18 and 115/116/118 remain deliberately excluded.

T136 ownership decision

0.13 intentionally exposes no color leases. Palette/dynamic-color mutation is explicitly unscoped; reset controls are terminal-policy reset, not exact restoration. Lifecycle-safe ownership requiring post-resume re-observation is deferred rather than changing core query/lifecycle ordering in this release.

Record: docs/T136-Scoped-Color-Ownership-Feasibility-and-Lifecycle-Decision.md.

T137 — composition and downstream observation acceptance

Implemented:

• color mutation/reset composition with ordinary text and OSC 133 output in exact session serialization order;
• active color observation coexisting with independently serialized control output while awaiting the matching response;
• exact palette-versus-dynamic response correlation tests;
• standalone tools/dcurses-color-observation-acceptance project;
• real Icod.DCurses 0.1.0 package dependency;
• scripted OSC 4 palette and OSC 11 dynamic-color queries returning typed 16-bit TerminalColor values;
• explicit adaptation from 16-bit observations to the current 8-bit CursesColor.Rgb downstream representation;
• styled DCurses refresh using observed colors through setrgbf / setrgbb, with no raw OSC parsing in DCurses;
• net8.0/net9.0/net10.0 downstream verifier;
• PR, distribution, and tagged-release wiring for the new color-observation acceptance gate.

Record: docs/T137-Color-Composition-and-DCurses-Observation-Acceptance.md.

Validation history

• T131 — workflow #539 green
• T132 — workflow #546 green
• T133 — workflow #553 green
• T134 — workflow #560 green
• T135 — workflow #566 green
• T136 — workflow #572 green

Remaining tranche

• T138 — public API baseline, README/sample/package contract, stable metadata, and exact release closure

Roadmap: Icod.Terminal-0.13.0-Development-Roadmap.md.

Immediate next step

After exact-head T137 validation is green, T138 closes the 0.13 public API, documentation, samples, NuGet-only package consumer/XML contract, and stable 0.13.0 release gates.