Port Pi v1.0.4 runtime modules to Rust

.gitattributes

@@ -0,0 +1,2 @@
+# Preserve reference input and output bytes on every platform.
+apps/maple-agent/pi-conformance/** -text

.github/workflows/agent-ci.yml

@@ -35,6 +35,7 @@ jobs:
     timeout-minutes: 5
     outputs:
       agent: ${{ steps.classify.outputs.agent }}
+      pi_reference: ${{ steps.classify.outputs.pi_reference }}
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
@@ -49,30 +50,55 @@ jobs:
           HEAD_SHA: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
         run: |
           set -euo pipefail
-          enable_agent() { echo 'agent=true' >> "$GITHUB_OUTPUT"; }
+          enable_checks() {
+            echo 'agent=true' >> "$GITHUB_OUTPUT"
+            echo 'pi_reference=true' >> "$GITHUB_OUTPUT"
+          }
           case "$GITHUB_EVENT_NAME" in
             pull_request) separator='...' ;;
             push)
               separator='..'
               if [[ "$BASE_SHA" =~ ^0+$ ]]; then
-                enable_agent
+                enable_checks
                 exit 0
               fi
               ;;
-            *) enable_agent; exit 0 ;;
+            *) enable_checks; exit 0 ;;
           esac
           if ! git cat-file -e "${BASE_SHA}^{commit}" || ! git cat-file -e "${HEAD_SHA}^{commit}"; then
-            enable_agent
+            enable_checks
             exit 0
           fi
           changed_paths="$(mktemp)"
           trap 'rm -f "$changed_paths"' EXIT
           if ! git diff --no-renames --name-only -z "${BASE_SHA}${separator}${HEAD_SHA}" > "$changed_paths"; then
-            enable_agent
+            enable_checks
           elif ! python3 scripts/ci/agent_change_detection.py < "$changed_paths" >> "$GITHUB_OUTPUT"; then
-            enable_agent
+            enable_checks
           fi
 
+  pi-reference:
+    name: Pi reference corpus
+    needs: changes
+    if: ${{ always() && !cancelled() && (needs.changes.result != 'success' || needs.changes.outputs.pi_reference != 'false') }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
+
+      - name: Install pinned Nix environment
+        uses: DeterminateSystems/nix-installer-action@ef8a148080ab6020fd15196c2084a2eea5ff2d25 # v22
+        with:
+          github-token: ""
+
+      - name: Upstream Pi tests at the pin
+        run: nix build ./pi-conformance#upstream-tests -L --no-link --no-update-lock-file
+
+      - name: Committed corpus equals a fresh recording
+        run: nix build ./pi-conformance#checks.x86_64-linux.corpus-fresh -L --no-link --no-update-lock-file
+
   desktop:
     name: Agent (${{ matrix.os }})
     needs: changes

apps/maple-agent/Cargo.toml

@@ -1,6 +1,16 @@
 [workspace]
 resolver = "2"
-members = ["crates/maple-agent", "crates/maple-billing", "app"]
+members = [
+    "crates/maple-agent",
+    "crates/maple-billing",
+    "crates/pi-ai",
+    "crates/pi-agent-core",
+    "crates/pi-coding-agent",
+    "crates/pi-mcp",
+    "crates/pi-testkit",
+    "crates/pi-conformance",
+    "app",
+]
 
 [workspace.package]
 edition = "2024"

apps/maple-agent/crates/PI-LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Mario Zechner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.