docs(sparkctl): add Phase 4 final rollup

Author: ProfRandom92

PHASE4G_SPARKCTL_FINAL_ROLLUP_SNAPSHOT.md

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+# Phase 4G Rollup Snapshot Report — Completed sparkctl Command Layer
+
+## 1. Sandbox Root & Scope
+- **Phase Name:** Phase 4G sparkctl final rollup snapshot
+- **Sandbox Root:** `C:\Users\contr\sandbox_workspace\Antigravity-Comptextv7-unified`
+
+## 2. Phase 4 Objective Summary
+Establish the unified CLI product identity `sparkctl` as the operations controller for the SPARK Context Layer. This consolidates crate diagnostics (`doctor`), code validation (`rust-validate`), pipeline lifecycle orchestration (`context-all`), integration pipeline demonstration (`spark-demo`), and pre-handoff verification (`handoff-check`) under a clean and secure interface.
+
+## 3. Completed CLI Command Surface & Purpose
+- **`sparkctl doctor`**: Diagnoses local project readiness by verifying the presence of configuration files, schemas, and output artifacts.
+- **`sparkctl rust-validate`**: Automates execution of local crate quality checks (`cargo fmt`, `cargo check`, `cargo test`, `cargo clippy`).
+- **`sparkctl context-all`**: Coordinates the local context pipeline sequence (`context-build`, `context-render`, `context-validate`).
+- **`sparkctl spark-demo`**: Orchestrates the full end-to-end integration lifecycle (`compress`, `context-build`, `context-render`, `context-validate`).
+- **`sparkctl handoff-check`**: Validates file completeness and command availability to ensure clean repository handoff status.
+
+## 4. Snapshot / Phase Files Included
+- [PHASE4A_SPARKCTL_PLANNING_HANDBOOK.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4A_SPARKCTL_PLANNING_HANDBOOK.md)
+- [PHASE4B_SPARKCTL_DOCTOR_SNAPSHOT.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4B_SPARKCTL_DOCTOR_SNAPSHOT.md)
+- [PHASE4C_SPARKCTL_RUST_VALIDATE_SNAPSHOT.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4C_SPARKCTL_RUST_VALIDATE_SNAPSHOT.md)
+- [PHASE4D_SPARKCTL_CONTEXT_ALL_SNAPSHOT.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4D_SPARKCTL_CONTEXT_ALL_SNAPSHOT.md)
+- [PHASE4E_SPARKCTL_SPARK_DEMO_SNAPSHOT.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4E_SPARKCTL_SPARK_DEMO_SNAPSHOT.md)
+- [PHASE4F_SPARKCTL_HANDOFF_CHECK_SNAPSHOT.md](file:///C:/Users/contr/sandbox_workspace/Antigravity-Comptextv7-unified/git_post_push_verification/repo/PHASE4F_SPARKCTL_HANDOFF_CHECK_SNAPSHOT.md)
+
+## 5. Safety & Security Boundaries
+- **No Git / Remote Actions:** Subcommands do not execute git staging, git commits, git pushes, or add remote repository references.
+- **No Network Activity:** The commands operate completely offline, without accessing remote APIs, registries, or networks.
+- **Strict Directory Bounds:** Scan boundaries are limited to the project workspace; no parent/sibling directories are traversed.
+- **First-Failure Stop:** Orchestrated command runners immediately abort on the first failed check, propagating non-zero exit codes.
+- **Determinism:** Offline behavior was deterministic in the validated test scope.
+
+## 6. Leak & Privacy Boundaries
+- Configured leak checks passed in the validated scope.
+- Subcommands enforce strict isolation of source data. No extraction payloads, applicant strings, decision recommendations, or extraction notes are dumped or logged in plain text.
+
+## 7. Known Limitations
+- GitHub Actions status is verified through GitHub UI outside this local rollup.
+- `handoff-check` is local repository readiness only and does not verify remote CI.
+- No official SPARK compatibility claim is made.
+- No compliance claim is made.
+
+## 8. Test Suite Status
+- **Current Total Integration Tests:** 32 tests.
+- Verified test cases assert correct behavior of all CLI binaries and commands (doctor, rust-validate, context-all, spark-demo, handoff-check).
+
+## 9. Artifact Update Status
+- **Artifacts Updated:** `extraction.spkg`, `context.json`, and `context_render.txt` are created/updated correctly in the `artifacts/spark/` directory.
+
+## 10. Verification Command Execution
+- `cargo fmt --all --check` -> OK (PASS)
+- `cargo check` -> OK (PASS)
+- `cargo test` -> OK (32 tests PASS)
+- `cargo clippy -- -D warnings` -> OK (PASS)
+- `cargo run --bin sparkctl -- doctor` -> OK (PASS)
+- `cargo run --bin sparkctl -- rust-validate` -> OK (PASS)
+- `cargo run --bin sparkctl -- context-all` -> OK (PASS)
+- `cargo run --bin sparkctl -- spark-demo` -> OK (PASS)
+- `cargo run --bin sparkctl -- handoff-check` -> OK (PASS)
+
+## 11. Risks
+- No blocking risks found in the validated scope.
+
+## 12. Recommended Next Phase
+- Commit Phase 4G rollup only after approval.