docs(rebrand): rename & rebrand CI → CIAgent across all documentation, templates, and scripts

- README.md: title, project name, CLI commands, .ci/ → .ciagent/, ci-files → ciagent-files, CI Modification → CIAgent Modification
- AGENTS.md: title, project name, architecture tree, agent count (18→19), test count (25→31 suites, 218→370 tests), version (0.4.0→0.6.0), ci-files → ciagent-files, CIConfig → CIAgentConfig, CiMetadata → CIAgentMetadata, .ci/ → .ciagent/
- templates/DECISIONS.md: .ci/audit/ → .ciagent/audit/, ci audit → ciagent audit
- scripts/postinstall.js: CI postinstall → CIAgent postinstall
- scripts/install.sh: CI → CIAgent, ci-init → ciagent-init, INSTALL COMPLETE banner
- opencode/ci/workflows/*.md (11 files): .ci/ → .ciagent/, CI → CIAgent project name, ci-command → ciagent-command usage lines
- opencode/ci/references/*.md (5 files): .ci/ → .ciagent/, CI → CIAgent project name, ci-files → ciagent-files references
- opencode/ci/contexts/*.md (3 files): .ci/ → .ciagent/, CI → CIAgent project name
- opencode/agents/ci-*.md (18 files): .ci/ → .ciagent/, CI → CIAgent project name
- opencode/command/ci-*.md (11 files): CI → CIAgent project name

Preserved: ---ci---/---/ci--- markers, opencode/ci/ dir paths, ci-*.md filenames, ci listProjects()/ci setActiveProject() API names, repo URLs

---ci---
phase: 1
milestone: v0.6
plan: 01-01
task: 01-01-01
status: execute
---/ci---

opencode/ci/references/git-context-loading.md

@@ -1,6 +1,6 @@
 <git_context_loading>
 
-How CI agents load project context. The git log IS the project memory — a CI agent's first impulse to gather context is `git log` + `git branch`, not file reads.
+How CIAgent agents load project context. The git log IS the project memory — a CIAgent agent's first impulse to gather context is `git log` + `git branch`, not file reads.
 
 ---
 
@@ -8,7 +8,7 @@ How CI agents load project context. The git log IS the project memory — a CI a
 
 **Read the log first, files second.**
 
-The git log contains every decision, escalation, lesson, and compound learning through structured `---ci---` YAML blocks. Files in `.ci/` are long-lived reference documents (PROJECT.md, ARCHITECTURE.md, ROADMAP.md, REQUIREMENTS.md, config.json) that change infrequently.
+The git log contains every decision, escalation, lesson, and compound learning through structured `---ci---` YAML blocks. Files in `.ciagent/` are long-lived reference documents (PROJECT.md, ARCHITECTURE.md, ROADMAP.md, REQUIREMENTS.md, config.json) that change infrequently.
 
 ## Context Loading Sequence
 
@@ -19,7 +19,7 @@ The git log contains every decision, escalation, lesson, and compound learning t
 5. **Requirements coverage** — `GitContext.getRequirementsCoverage()` for covered/partial
 6. **Lessons scan** — `GitContext.getLessons()` for all learned lessons
 7. **Compound learnings** — `GitContext.getCompounds()` for cross-phase patterns
-8. **File reads** — Only now read `.ci/` files (PROJECT.md, ARCHITECTURE.md, etc.)
+8. **File reads** — Only now read `.ciagent/` files (PROJECT.md, ARCHITECTURE.md, etc.)
 
 ## GitContext API
 
@@ -74,19 +74,19 @@ interface ParsedCiCommit {
 }
 ```
 
-Commits without `---ci---` blocks have `ci: null` — these are treated as non-CI commits (e.g., manual edits by the developer).
+Commits without `---ci---` blocks have `ci: null` — these are treated as non-CIAgent commits (e.g., manual edits by the developer).
 
 ## Phase Context Reset
 
 Between phases, all state is committed to git, then the next phase starts with fresh context from git log — not accumulated conversation history.
 
-**On opencode (subagent support):** spawn a fresh agent for the next phase. The new agent loads context from git log and `.ci/` files only.
+**On opencode (subagent support):** spawn a fresh agent for the next phase. The new agent loads context from git log and `.ciagent/` files only.
 
 **On platforms without subagents:** simulated reset — re-read git context from scratch, ignore prior conversation history. Treat the phase boundary as a hard context boundary.
 
 **Checkpoint sequence:**
 1. Commit all work from the current phase
-2. Update `.ci/` files (ROADMAP.md phase status, REQUIREMENTS.md requirement statuses)
+2. Update `.ciagent/` files (ROADMAP.md phase status, REQUIREMENTS.md requirement statuses)
 3. Verify `GitContext.reconstructState()` matches expected state
 4. Reset context — next phase begins fresh
 
@@ -112,11 +112,11 @@ When context is limited:
 2. `getDecisions(currentPhase)` — current phase decisions only
 3. `getRequirementsCoverage()` — aggregate view
 4. Skip lessons/compounds unless specifically needed
-5. Read `.ci/ROADMAP.md` instead of scanning all phase branches
+5. Read `.ciagent/ROADMAP.md` instead of scanning all phase branches
 
 ## What NOT to Do
 
-- Never read `.ci/` files before checking the git log
+- Never read `.ciagent/` files before checking the git log
 - Never parse commit messages manually — use `CommitParser.parseCommitMessage()`
 - Never assume the latest commit reflects the current state — check branches
 - Never reconstruct state from files when git data is available