feat: merge-train/fairies (#22813)

BEGIN_COMMIT_OVERRIDE
test(aztec-up): add full-dev-path e2e test for installed toolchain
(#22801)
END_COMMIT_OVERRIDE

Author: nchamo

.github/workflows/full-dev-path.yml

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+# Tests that the installed Aztec toolchain works end-to-end.
+# Exercises the full developer onboarding path: aztec init -> compile -> test -> start -> codegen -> TS end-to-end test.
+name: Full Dev Path Test
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version to install (e.g. latest, nightly, 4.3.0, 4.3.0-nightly.20260420)"
+        required: true
+        type: string
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  full-dev-path:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    env:
+      VERSION: ${{ github.event.inputs.version || github.ref_name }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+
+      - name: Run full dev path test
+        run: ./aztec-up/test/full-dev-path/run-test.sh
+
+      - name: Notify Slack on success
+        if: success() && github.event_name != 'workflow_dispatch'
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
+        run: |
+          export CI=1
+          ./ci3/slack_notify "#team-fairies" \
+            "Full Dev Path Test passed for version ${VERSION} :white_check_mark:"
+
+      - name: Notify Slack and dispatch ClaudeBox on failure
+        if: failure() && github.event_name != 'workflow_dispatch'
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.AZTEC_BOT_GITHUB_TOKEN }}
+        run: |
+          RUN_URL="https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+          export CI=1
+          ./ci3/slack_notify_with_claudebox_kickoff "#team-fairies" \
+            "Full Dev Path Test FAILED (version ${VERSION}): <${RUN_URL}|View Run>" \
+            "Full dev path test failed for version ${VERSION}. CI run: ${RUN_URL}. Investigate the failure and explain the root cause." \
+            --link "$RUN_URL"

aztec-up/test/full-dev-path/README.md

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+# Full Dev Path Test
+
+Tests that the installed Aztec toolchain works end-to-end. Exercises the complete developer onboarding path:
+
+1. `aztec init` - scaffold a new workspace with a Counter contract and test crate
+2. `aztec compile` - compile the scaffolded contract
+3. `aztec test` - run the TXE tests from the scaffold's test crate
+4. `aztec start --local-network` - start a local sandbox (anvil + aztec node)
+5. `aztec codegen` - generate TypeScript bindings from the compiled artifact
+6. TS end-to-end test - run a `node --test` suite inside the scaffolded workspace that imports the codegen'd `CounterContract`, stands up an in-process wallet + PXE via `@aztec/wallets/embedded`, deploys Counter, calls `increment`, and reads the value back through the `get_counter` utility function
+
+## Running
+
+With an existing local install (fast inner loop):
+```bash
+SKIP_INSTALL=1 ./run-test.sh
+```
+
+With a fresh install from a specific version:
+```bash
+VERSION=4.3.0 ./run-test.sh
+```
+
+## Environment Variables
+
+| Variable | Description |
+|----------|-------------|
+| `SKIP_INSTALL` | Set to `1` to skip the installer and use the already-installed toolchain. |
+| `VERSION` | Version to install (e.g. `4.3.0` or `v4.3.0`). Required unless `SKIP_INSTALL=1`. |
+
+## Architecture
+
+- **`run-test.sh`** - Bash launcher. Runs the aztec installer (unless skipped), sets up PATH, then `exec node full-dev-path.ts`.
+- **`full-dev-path.ts`** - Orchestrator. Runs each CLI step against the installed toolchain and, after codegen, copies `counter.test.ts` into the scaffolded workspace and spawns `node --test` on it. Each phase is wrapped in `step(name, fn)` so failures clearly identify which step broke. Always emits a machine-readable result line for CI/Slack integration: `TEST_RESULT=pass version=...` on success, or `TEST_RESULT=fail step=... version=... error="..."` on failure (with a full banner printed above it).
+- **`counter.test.ts`** - The `node:test` suite that drives the deployed Counter end-to-end through the codegen'd bindings. Lives here as a template; copied into the workspace at test time so it can statically `import { CounterContract } from './artifacts/Counter.js'` with real codegen types and resolve `@aztec/*` via the workspace's `node_modules` symlink to the install.

aztec-up/test/full-dev-path/counter.test.ts

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+// End-to-end test for the scaffolded Counter contract.
+//
+// Copied into the scaffolded workspace at test time by ../test.ts, then executed with
+// `node --test`. Runs from inside the workspace so that:
+//   - `./artifacts/Counter.js` resolves to the codegen'd bindings (and its types flow).
+//   - `@aztec/*` imports resolve via the workspace's `node_modules` symlink to the
+//     installed Aztec toolchain — i.e. the same packages a real user would have.
+//
+// The test expects an `aztec start --local-network` node reachable at NODE_URL. It uses the
+// pre-funded test0 account that local-network already deployed, stands up an in-process
+// EmbeddedWallet + PXE, deploys a fresh Counter, and exercises a full round trip through
+// the codegen'd bindings (send + simulate).
+
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { getInitialTestAccountsData } from '@aztec/accounts/testing';
+import { EmbeddedWallet } from '@aztec/wallets/embedded';
+
+import { CounterContract } from './artifacts/Counter.ts';
+
+const NODE_URL = process.env.NODE_URL ?? 'http://localhost:8080';
+const INITIAL_COUNTER_VALUE = 0n;
+
+test('Counter deploys and increments through codegen bindings', async () => {
+  const wallet = await EmbeddedWallet.create(NODE_URL, { ephemeral: true });
+
+  const [test0] = await getInitialTestAccountsData();
+  await wallet.createSchnorrAccount(test0.secret, test0.salt, test0.signingKey);
+  const owner = test0.address;
+
+  const { contract: counter } = await CounterContract.deploy(wallet, INITIAL_COUNTER_VALUE, owner).send({
+    from: owner,
+  });
+
+  const initial = await counter.methods.get_counter(owner).simulate({ from: owner });
+  assert.equal(initial.result, INITIAL_COUNTER_VALUE, 'counter value just after deploy');
+
+  await counter.methods.increment(owner).send({ from: owner });
+
+  const afterIncrement = await counter.methods.get_counter(owner).simulate({ from: owner });
+  assert.equal(afterIncrement.result, INITIAL_COUNTER_VALUE + 1n, 'counter value after increment');
+});