Upgrade simulation API to PolicyEngine v4.10

.github/CONTRIBUTING.md

@@ -0,0 +1,66 @@
+# Contributing to policyengine-api-v2
+
+See the shared PolicyEngine contribution guide for cross-repo conventions. This
+file covers policyengine-api-v2 specifics.
+
+## Commands
+
+```bash
+make format                # format Python source with Ruff
+make check                 # Ruff check + Pyright over source directories
+make test                  # service unit tests in Docker
+make test-complete         # unit tests + local integration tests
+make push-pr-branch        # push current branch to origin with tracking
+./scripts/generate-clients.sh
+```
+
+For simulation-service-only checks:
+
+```bash
+cd projects/policyengine-api-simulation
+uv sync --extra test
+uv run pytest tests/ -v
+```
+
+## Test Organisation
+
+- Service unit tests live under each service's `tests/` directory, for example
+  `projects/policyengine-api-simulation/tests/`.
+- Generated-client integration tests live under
+  `projects/policyengine-apis-integ/tests/`.
+- Unit tests should mock Modal, GCP, Hugging Face, and other network seams.
+- Integration tests should use generated clients and clearly state any required
+  service, GCP, Modal, or staging dependency.
+
+## Opening PRs
+
+Always create branches on the canonical repository, not a fork. The convenience
+target:
+
+```bash
+make push-pr-branch
+```
+
+pushes the current branch to `origin` with the correct tracking so
+`gh pr create` works. Then create and verify the PR explicitly:
+
+```bash
+gh pr create --draft --repo PolicyEngine/policyengine-api-v2 --head "$(git branch --show-current)" --base main
+gh pr view <PR> --repo PolicyEngine/policyengine-api-v2 --json isDraft,headRepositoryOwner,headRepository
+```
+
+Before opening the PR, open or identify a GitHub issue for the work. The first
+line of the PR description must be `Fixes #ISSUE_NUMBER`.
+
+The PR is valid only if it is a draft and the head repository is
+`PolicyEngine/policyengine-api-v2`. If you cannot push to that repository, ask
+for access instead of opening a fork PR.
+
+## Repo-Specific Anti-Patterns
+
+- Do not open PRs from personal forks.
+- Do not add `[codex]`, `[claude]`, `[copilot]`, or other agent labels to PR
+  titles.
+- Do not hand-edit generated clients without documenting why regeneration is
+  not appropriate.
+- Do not skip integration/client checks when changing public API schemas.

.github/copilot-instructions.md

@@ -0,0 +1,11 @@
+# Copilot Instructions
+
+Follow the repository's canonical engineering skills under
+`docs/engineering/skills/`.
+
+For tests, read `docs/engineering/skills/testing.md` before adding, moving, or
+reviewing test files. Do not duplicate or override that testing guidance here.
+
+For pull requests, read `docs/engineering/skills/github-prs.md` before opening,
+replacing, or sharing a PR. This repository only accepts same-repository PRs
+from branches in `PolicyEngine/policyengine-api-v2`; never create fork PRs.

.github/pull_request_template.md

@@ -0,0 +1,14 @@
+Fixes #
+
+## Same-Repository Draft PR Check
+
+- [ ] This PR is a draft.
+- [ ] This PR is from a branch in `PolicyEngine/policyengine-api-v2`, not a personal fork.
+
+## Summary
+
+-
+
+## Testing
+
+-

.github/scripts/modal-deploy-app.sh

@@ -2,6 +2,7 @@
 # Deploy simulation API to Modal
 # Usage: ./modal-deploy-app.sh <modal-environment>
 # Required env vars: POLICYENGINE_US_VERSION, POLICYENGINE_UK_VERSION
+# These should come from the bundled policyengine.py release manifest.
 #
 # Deploys two apps:
 # 1. policyengine-simulation-gateway - Stable gateway with fixed URL

.github/scripts/modal-extract-versions.sh

@@ -1,17 +1,14 @@
 #!/bin/bash
-# Extract policyengine-us and policyengine-uk versions from uv.lock
+# Extract policyengine-us, policyengine-us-data, policyengine-uk, and
+# policyengine-uk-data versions from the bundled policyengine.py manifests.
 # Usage: ./modal-extract-versions.sh <project-dir>
-# Outputs: Sets us_version and uk_version in GITHUB_OUTPUT
+# Outputs: Sets policyengine_version, us_version, us_data_version, uk_version,
+# and uk_data_version in GITHUB_OUTPUT
 
 set -euo pipefail
 
 PROJECT_DIR="${1:-.}"
 
 cd "$PROJECT_DIR"
 
-US_VERSION=$(grep -A1 'name = "policyengine-us"' uv.lock | grep version | head -1 | sed 's/.*"\(.*\)".*/\1/')
-UK_VERSION=$(grep -A1 'name = "policyengine-uk"' uv.lock | grep version | head -1 | sed 's/.*"\(.*\)".*/\1/')
-
-echo "us_version=$US_VERSION" >> "$GITHUB_OUTPUT"
-echo "uk_version=$UK_VERSION" >> "$GITHUB_OUTPUT"
-echo "Deploying with policyengine-us=$US_VERSION, policyengine-uk=$UK_VERSION"
+uv run python -m src.modal.utils.extract_bundle_versions