docs/CHANGELOG.md

# Changelog

All notable changes to SatQuery AI. Dates are ISO-8601. This changelog records **what changed and
what was verified**, and marks unresolved items honestly rather than omitting them.

Status tags: `RESOLVED` · `OPEN` · `CLOSED` · `DEFERRED` · `REJECTED`.

---

## [1.0.0] — 2026-09-25 — Final documentation, model release and archival freeze

The release that makes the project legible and citable: repository documentation, research
documentation, model documentation, a Hugging Face model release, a curated public repository, and a
verified evidence archive.

### Added
- **Repository README** (27 sections) — motivation through citation, with the deployed topology, the
  six supported tasks, routing, the eight execution events, measured results, live validation, and
  known limitations.
- **Research documentation set** — `ARCHITECTURE.md`, `MODELS.md`, `BENCHMARKS.md`, `DATASETS.md`,
  `TRAINING.md`, `EVALUATION.md`, `DEPLOYMENT.md`, `REPRODUCIBILITY.md`, `LIMITATIONS.md`,
  `RESEARCH_NOTES.md`, `CHANGELOG.md`.
- **Model documentation** — `MODEL_CARD.md`, generated `models/manifest.json` and
  `models/checksums.sha256`.
- **Hugging Face release** of the six trained artifacts to `thundercode/SatQuery`, with a verification
  record.
- **Curated public repository** at `Anish-lab-blip/SatQuery-AI` with a release manifest.
- **Evidence archive** (ZIP64, artifacts verbatim) with an integrity-verified extraction and a
  documented remote location.
- **Metric verification tool** — `tools/verify_readme_metrics.py`, checking all 20 quoted metrics and
  the status assertions against their artifacts.

### Changed
- The monorepo `README.md` was **materially stale** and is superseded by this release's README. The
  stale version called the frontend "hermetic — no backend calls", put Render/Codespace as
  "in progress", described a `/v1/*` contract, and pointed at the untracked `deploy/` as the
  deployment source. All four were wrong.
- `hf/` documentation was **stale** — it asserted the project "does not own any model weights … ships
  no weights, no binaries, and no large artifacts" and "has no Hugging Face credentials". Both were
  false at release time and are corrected.

### Fixed
- **Router defect** — *"Where are the built-up areas in this image?"* collapsed to `vqa` and answered
  "River". Fixed in the dispatch path and validated across three independent live passes (8/8 each).
  `RESOLVED`.
- **Live-validation harness false positive** — synthetic CDP key events were silently dropped when the
  window lacked OS focus, so the harness dispatched the page's default query and recorded a false
  pass. Fixed with pre-dispatch form-state assertions. `RESOLVED`.
- **Bundled EO change pair** — the demo pair differed in shape (726² vs 736²) and errored. Replaced
  with a same-shape pair (both 720×720). `RESOLVED` (supersedes `FINAL_DELIVERY_REPORT.md` §6).
- **B-01 (Hugging Face header link)** — previously `BLOCKED`; the link is now live on all 11 pages.
  `CLOSED`.

### Known issues at this release
- **B-07** — transient tunnel-agent gaps; a request can hang or return 504. Patch prepared, **NOT
  deployed**. `OPEN`.
- **B-02** — `/api/health` `codespace_name` carries a trailing `\n`. Cosmetic. `OPEN`.
- **No `LICENSE` file** exists. `OPEN`.
- **No system-level end-to-end benchmark** exists. `NOT RUN`.
- **Router test split** never scored. `NOT RUN`.
- **Calibration** worsened ECE (0.013755 → 0.014929). Retained as part of the frozen config only.
- **VLM adapter** is `ACCEPTANCE-REJECTED` despite usable metrics; the deployed path uses the
  unadapted model.
- **optical-SAR** and **change-VQA** rulings remain `OPEN`.

### Deployment revisions at this release
| Component | Revision |
|---|---|
| Frontend | `2d7ae53b482d` |
| Backend | `89d80eaddec5` |
| Inference | `5a0936ace491` |
| Public umbrella | `3dcabd32da41` |

---

## [0.9.0] — 2026-09-25 — Router-defect sprint

- Diagnosed and fixed the router misroute (region queries → `vqa`).
- Deployed three commits to the frontend.
- Ran **3 independent live validation passes**, 8/8 each — 24 live runs, 24 correct dispatches,
  0 mock nodes, trace fill 94.4444 %.
- Wrote the delivery report and handoff.

---

## [0.8.0] — 2026-09-24/25 — Deployment hardening

- Live topology settled on **Cloudflare Pages → Render → outbound tunnel → Codespace** (CPU).
- Closed the five historical backend blockers (ASGI stack in requirements; `$PORT` read; `OPTIONS`
  preflight; fail-fast app construction; adapter integrity compared against an expected digest).
- Documented cold start; `transport_mode: auto` fallthrough recorded.

---

## [0.7.0] — Grounding and change heads

- Grounding: trainable head over frozen RemoteCLIP ViT-B/32. Resolution **224 chosen, 448 rejected**
  by a pre-registered paired test.
- Change: STANet-style Siamese detector on LEVIR-CD-256 — the only `VERIFIED` headline metric.
- Optical-SAR: CROMA-base fusion head, seed sweep, pre-registered 115-class metric.

---

## [0.6.0] — VLM adaptation

- SmolVLM-500M LoRA adapter trained (PEFT 0.19.1, r = 16, α = 32).
- Metrics usable (exact_match 0.963) but **acceptance-rejected** for promotion. `REJECTED`.
- Findings F5-1/F5-2/F5-3 recorded (loader class, ~17× processor overrun, chat-template requirement).

---

## [0.5.0] — Router

- 50,822-parameter adapter over frozen MiniLM; cached embeddings; CPU-only training (0.28 s for 20
  epochs / 4,096 vectors).
- Group-based splits with hard negatives in the test split.

---

## [0.1.0] — Foundation

- Monorepo, frozen configuration registry (`configs/base.yaml`), config-hash freeze
  (`78f1e3700da15aa1`), nine-state controller, four-endpoint inference contract, evidence schema
  (`Region` / `ChangeRegion`), eight frontend execution events.

---

## Unreleased / open

| Item | State |
|---|---|
| Deploy the B-07 tunnel-fallthrough fix | prepared, **NOT deployed** |
| Score the router test split | **NOT RUN** |
| Build a system-level end-to-end benchmark | **NOT RUN** |
| Select a licence | **OPEN** |
| Resolve the optical-SAR and change-VQA rulings | **OPEN** |
| Plot the calibrated reliability curve | **NOT RUN** |