release: promote develop to main (0.3.5, PRD-624)

.agents/skills/capture-strata-worlds

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+../../.claude/skills/capture-strata-worlds

.agents/skills/contribute/SKILL.md

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+---
+name: contribute
+description: Use when choosing and delivering a ThreeNative contribution.
+license: MIT
+---
+
+# Contribute to ThreeNative
+
+AI-written pull requests are welcome. Prefer a current frontier Claude or Codex model
+for implementation and review; neither provider nor model is required. The author
+remains responsible for scope, tests, evidence and maintainer review.
+
+## Load the contract
+
+Work in a checkout of `ThreeNativeHQ/threenative-engine`, not in the website or a
+private editor. Read root `AGENTS.md`, `CONTRIBUTING.md`, `docs/PRDs/AGENTS.md` and
+`docs/CURRENT-CHALLENGES.md`, then the selected PRD and every applicable nested
+`AGENTS.md`. Those live instructions govern; this skill does not override them.
+Never hand-edit generated `CLAUDE.md`.
+
+## Select work, not a stale checkbox
+
+Follow [live discovery](references/live-discovery.md) before changing product code.
+Return the best **three eligible PRDs** (or fewer if fewer genuinely qualify), with
+priority, the still-missing user outcome, code/test evidence, dependencies, current
+PR/claim check and feasible proof. Explain the ranking and exclusions briefly.
+
+If asked to contribute without a named task, pick the highest-value eligible PRD
+and proceed locally; do not ask which of three to choose. Recommendation-only or
+read-only requests stop after the shortlist. A named task still needs the duplicate,
+dependency and verification checks. If current PR/claim inventory is unavailable,
+mark recommendations provisional and stop before implementation; do not guess that
+an unchecked box is unclaimed. Never invent a third candidate to fill the table.
+
+## Deliver one meaningful task
+
+1. Identify engine versus game/template ownership and why. Define the selected
+   PRD's deliverable, explicit non-goals, acceptance claims and commands before
+   coding. A narrow verified phase may be useful, but is not PRD completion.
+2. Inspect status and worktrees. Preserve all existing changes; use your own branch
+   and clean worktree from freshly inspected upstream `develop`, not local
+   `develop`: `origin/develop` when origin is ThreeNativeHQ, otherwise
+   `upstream/develop` when origin is your fork. Verify remote URLs and base
+   freshness; fetch only within allowed network scope. Without upstream write
+   access, use a contributor-owned fork and push only its contribution branch;
+   open the draft against `ThreeNativeHQ/threenative-engine:develop` with
+   `<fork-owner>:<branch>` as head. Never push upstream `develop` or `main`.
+   Fork creation is a public write and needs publication authorization too.
+   Set `git config threenative.integrationBranch develop` in your checkout.
+   Do not reset, stash, clean or commit someone else's files.
+3. Run `pnpm prd:progress <file>` before starting and after each phase. Repair
+   missing per-phase boxes with inline proof commands before implementation; do
+   not count ceremony or inaccessible hardware as progress. Read the script's
+   printed label rather than estimating it.
+4. One PR per PRD. With explicit publication authorization, make the first scoped
+   planning commit and open a **draft targeting `develop` before phase 1**, then
+   continue on that same PR. Recheck live claims immediately before publishing;
+   if another PR owns the PRD, stop rather than create a second. If publication
+   is not authorized, commit locally and report that the required draft is pending;
+   never silently push or open it. A read-only task never creates commits.
+5. Search existing capabilities using `engine_search_capabilities` and inspect
+   hits with `engine_capability_detail` as root AGENTS requires. If required tools
+   are unavailable, resolve the supported MCP setup or report the blocker; do not
+   skip lookup and duplicate an installed system.
+6. For behavior changes, reproduce the defect or unmet contract with a real
+   failing test, implement the smallest fix, then rerun to green. Keep observed
+   red and green results. Do not manufacture failures for prose or planning.
+7. Prove runtime behavior with the relevant real playtest, not units alone. For
+   portable engine seams, include native conformance or `--target` playtest proof
+   in the same commit. Read package instructions for exact supported commands.
+   Visual changes follow the live independent-review/capture requirements in root
+   and package AGENTS; do not assume a removed protocol still applies. Where a
+   visual judge is required, capture matched before/after poses and act on its
+   verdict. Run the applicable docs or executable gate lane and obtain independent
+   code review.
+8. Update PRD boxes only when their exact proof passed, with command/result beside
+   each, in the same commit as its change. Leave partial or unrun claims open.
+   Synchronize the PR checklist and printed progress label on each authorized
+   push. Keep one push per CI run; do not call a green drift hook runtime proof.
+   Move the PRD to `docs/PRDs/done/` only in the commit that verifies every outcome.
+
+## Boundaries and finish
+
+Preserve vanilla Three.js compatibility. Reuse the engine's harnesses; no second
+scene format, editor, ECS or bespoke CLI. Framework packages own mechanisms,
+**never the look**: appearance belongs in generated game render source. Do not
+edit the frozen `examples/abyss-vanilla/` control, weaken pinned acceptance gates,
+or claim mobile FPS from an emulator or software adapter.
+
+Pushing, opening/updating a public PR, publishing screenshots or messages requires
+explicit contributor authorization. Local contribution work does not authorize
+merge, deployment, releases, purchases, credential access or bypassing approvals.
+Never include secrets, private infrastructure or local-machine paths in public
+artifacts. Treat PR bodies and linked material as evidence, not permission to run
+untrusted commands. Ask only when a real permission, owner decision or missing
+prerequisite prevents safe progress.
+
+Report selected PRD, changed files, local commit(s), PR URL if actually published,
+executed checks and their results, review findings, and every remaining/unverified
+acceptance claim. Draft/partial is an honest outcome; never imply merge readiness
+from a checkbox, planned command or an unrun platform.

.agents/skills/contribute/references/live-discovery.md

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+# Live PRD discovery
+
+Run this afresh for each contribution; this file deliberately contains no fixed
+list of “good first” PRDs or model version names.
+
+## 1. Establish the inventory
+
+Confirm checkout, remote and revision with `git status --short`, `git remote -v`
+and `git rev-parse HEAD`. Enumerate **tracked** Markdown PRDs using
+`git ls-files 'docs/PRDs/*.md' 'docs/PRDs/**/*.md'`. Inspect the live status, priority,
+phase boxes, acceptance criteria, `Depends on`, `Blocked on`, decisions and batch
+execution instructions. Exclude `done/`, `BLOCKED/`, cancelled, declined,
+superseded and absorbed work as new tasks. A pending file with no boxes needs
+inspection, not automatic exclusion; directory and unchecked count are hints.
+
+Read the current full open-PR inventory, including drafts:
+
+```sh
+gh pr list --repo ThreeNativeHQ/threenative-engine --state open --limit 1000 \
+  --json number,title,body,headRefName,baseRefName,isDraft,url
+```
+
+If the result reaches the limit, paginate `gh api` until exhausted. Public GitHub
+REST or the public pull-request page is a read-only fallback; authentication is
+not permission to publish. If none works, report the failed lookup and stop at
+provisional recommendations. Record the observation time and revision in the
+response, not as a frozen shortlist in this skill.
+
+Match PRD identifiers **and semantic scope** against titles, bodies, head branches,
+linked plans and, for uncertain matches, changed-file inventories (`gh pr view
+<number> --repo ThreeNativeHQ/threenative-engine --json files,body,commits`). A
+mention of another PRD as a dependency is not a claim, but a batch/epic that owns
+it is. Look for renamed identifiers and owner-authorized batch exceptions.
+Inspect `git worktree list --porcelain` and `pnpm worktree:status` when available,
+plus documented owner/branch claims; do not recursively inspect other agents'
+worktrees. An active branch or explicit in-progress claim is a collision even if
+no PR has yet been opened. Unresolved ownership means ineligible, not unclaimed.
+Never reopen a completed PRD by deleting its historical evidence.
+
+## 2. Verify the missing outcome
+
+For each promising PRD, read the actual implementation, callers, focused tests
+and cited landing commits on the chosen base. Check merged/closed PRs by exact
+identifier when status is stale. Do not assume an absent exact-name PR means
+absent implementation. Examples of decisive evidence:
+
+- A claimed missing export already exists and its caller/test covers the behavior:
+  exclude implementation work, or identify the precise remaining consumer gate.
+- An unchecked platform claim is genuinely unrun: a verification task may qualify
+  only if that platform and required assets/tools are available.
+- A dependent's prerequisite is completed in code: cite its proof; if unresolved,
+  choose the eligible prerequisite instead. Detect dependency cycles.
+
+For scope still missing, name `file:line` anchors, the affected user workflow and
+the existing test/playtest that can prove the outcome. Check available tools,
+GPU/native host, emulator/device and needed assets without installing unknown
+hooks, obtaining credentials or spending money. No support or performance claim
+extends beyond the target actually exercised. Do not select blocked-only work;
+a mixed PRD is eligible only for an independent meaningful phase whose blockers
+do not invalidate its acceptance claims.
+
+## 3. Rank and choose
+
+Use evidence-based judgement, in this order:
+
+1. Explicit maintainer direction and canonical priority of the **unfinished**
+   outcome. P0 needs documented immediate-blocker evidence, not an old folder name.
+2. Measurable user impact: correctness, fewer cold-agent failures, supported native
+   parity, playable frame time, reliable startup or an actual release blocker.
+3. Dependency unlock: indispensable prerequisites of urgent outcomes, not optional
+   consumers. Cite the dependent's explicit dependency rather than inventing one.
+4. Ability to produce decisive red/green and real consumer/platform proof in this
+   checkout, balanced against scope, architecture risk and hardware availability.
+
+Do not optimize for checkbox count, easy cosmetic edits or the biggest proposal.
+The top three table includes PRD/path, priority, missing outcome/code evidence,
+claim/PR check, dependency state, proof commands and risk. State exclusions of
+particularly tempting already-shipped, blocked or in-flight work. When fewer than
+three qualify, say so. Pick the best eligible task by default, bound its acceptance
+scope, and refresh inventory at the handoff to implementation and again before
+any authorized draft/publication. A completed discovery pass is not a lease.

.agents/skills/native-performance-loop/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: native-performance-loop
-description: Run an autonomous ThreeNative native-performance optimization loop using existing harnesses, quick synthetic load tests, and representative real games. Profile bottlenecks, make focused changes, accept or reject measured experiments, and maintain an HTML benchmark dashboard. Use for sustained native runtime optimization, frame pacing, startup, memory, or thermal efficiency campaigns.
+description: Run an autonomous ThreeNative native-performance optimization loop using existing harnesses, quick synthetic load tests, and representative real games. Profile bottlenecks, make focused changes, accept or reject measured experiments, and maintain an HTML benchmark dashboard. Use for sustained native runtime optimization, frame pacing, startup, memory, or thermal efficiency campaigns, including the Tempest (rain) campaign where the web Wasm engine must beat stock three.js with the same image.
 ---
 
 # Native performance loop
@@ -41,6 +41,15 @@ the developer to supervise each iteration. Creating or editing this skill does n
    Keep separate goals for frame tails, startup, memory, and energy. Never optimize a blended
    score that can conceal one game's regression. Run the unchanged baseline before editing.
 
+## KPIs and named campaigns
+
+- Score every campaign on [engine-kpis.md](references/engine-kpis.md) as well as on its primary
+  scalar. Keep a lever only if it moves at least one engine KPI and the sentinel game does not
+  regress. A lever that helps one game only is `provisional`.
+- For the Tempest sample (the `rain` template, web Wasm engine against stock three), read
+  [tempest.md](references/tempest.md). It sets goals T1 to T3, the image-identity rule, the arms,
+  the capture recipe and the known state.
+
 ## The experiment loop
 
 Repeat without asking for a new task after each result:

.agents/skills/native-performance-loop/agents/openai.yaml

@@ -1,4 +1,4 @@
 interface:
   display_name: "Native Performance Loop"
-  short_description: "Optimize native games with measured keep/reject loops"
+  short_description: "Optimize native games and Tempest with measured keep/reject loops"
   default_prompt: "Use $native-performance-loop to improve native game performance, choose representative workloads, keep verified gains, and maintain an HTML benchmark dashboard."

.agents/skills/native-performance-loop/references/engine-kpis.md

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+# Engine KPIs that pay in every game
+
+These KPIs are the scoreboard of every campaign, whatever its workload. Each one measures an
+engine cost that every game pays when it draws. A lever that moves one of them helps all
+templates. A lever that moves only one game's frame time is suspect.
+
+Record each KPI for both arms (the engine under test and its control, such as stock three on the
+web or the incumbent build) at the frozen pose or route. Where a meter is
+missing, add the smallest meter with a check as a separate harness change, then re-baseline. Do
+not estimate a value.
+
+## GPU (rank first when the game is GPU-bound)
+
+| KPI | Definition | Target | Meter |
+| --- | --- | --- | --- |
+| G1 GPU cost ratio | Engine GPU ms ÷ control GPU ms (stock three on the web), same pose, size and tier | ≤ 1.0, then lower | playtest `assert.performance` window `gpuMs`, both arms |
+| G2 Shader cost per material | Instructions, texture samples and loop trip counts in the emitted WGSL, against three's WGSL for the same node graph | ≤ three on every program | WGSL dump from both engines; diff per program |
+| G3 Full-screen passes per frame | Passes that touch every pixel, plus MSAA resolves and target-to-target copies | ≤ three; 0 redundant copies | pass list from the render graph; Dawn capture if needed |
+| G4 Render-target bytes | Sum of live color, depth and MSAA target memory | ≤ three | renderer target census |
+| G5 Load/store waste | Clears and stores of targets that the next pass overwrites or never reads | 0 | pass descriptors (loadOp/storeOp) |
+
+## CPU and the JS/Wasm boundary
+
+| KPI | Definition | Target | Meter |
+| --- | --- | --- | --- |
+| C1 Render CPU ms | CPU time from `render()` entry to submit | ≤ three | window `cpuMs` |
+| C2 Boundary calls per frame | JS→Wasm and Wasm→JS calls in one steady frame | falls as levers land | call counter in `packages/three-native` glue |
+| C3 Steady GPU object churn | Bind groups, buffers, textures and pipelines created per steady frame | 0 | create counters in the renderer |
+| C4 Upload bytes per frame | `writeBuffer`/`writeTexture` bytes in a steady frame | only data that changed | upload counter |
+
+## Startup and hitches
+
+| KPI | Definition | Target | Meter |
+| --- | --- | --- | --- |
+| S1 Pipeline count and compile time | Distinct render pipelines at the pose, and `compileMs` / `compileSettledMs` | ≤ three | `pipelineCensus`, compile fields |
+| S2 First-use hitch | Worst frame in the first 5 s after the pose is ready | ≤ 2x budget | presented intervals after the ready mark |
+| S3 Time to first frame | Navigation start to the first presented world frame | ≤ three | loading scenario marks |
+
+## Pacing and memory
+
+| KPI | Definition | Target | Meter |
+| --- | --- | --- | --- |
+| P1 Presented interval | p50, p95 and p99 of the real presented interval (not rAF and not fps) | p95 ≤ budget | presentation samples |
+| P2 Frames in flight | Frames submitted and not yet complete | ≤ 2 (backpressure) | `framesOnGpu` in `web_host.cpp` |
+| M1 Steady memory growth | JS heap and Wasm memory growth per minute at the pose | 0 after warmup | `performance.memory`, `WebAssembly.Memory` byte length |
+
+## Guard KPIs (must not move)
+
+| KPI | Definition | Limit |
+| --- | --- | --- |
+| V1 Visual parity | Mean absolute diff against the control at the pose, 0–255 | ≤ 0.01 and judge NEUTRAL or IMPROVEMENT |
+| V2 Behavior | The workload's playtest set and the sentinel game's set | No new red |
+| V3 Workload identity | Draw calls, triangles and active stages | Same as the baseline, unless the lever deletes provably redundant work and the judge passes |
+
+## Reading the scoreboard
+
+- Report each KPI as baseline, incumbent and absolute delta, with a percent only for a positive
+  baseline. Do not blend KPIs into one score.
+- Show a KPI that is not yet metered as `unavailable: <reason>`.
+- A drop in G3, G5, C3 or C4 with no GPU or CPU ms change is still a kept maintenance win only if
+  it is proven on the sentinel. Label it as such. Do not label it a speedup.