d08df88df5
An end-to-end audit of the (unmerged) interceptor slice surfaced seven ways a
KV allow/deny guard could be silently defeated or misbehave. Close all of them:
1. Shared-collection bypass — `kv::shared_collection(...).set/delete` skipped
the hook entirely, so any `(kv, set/delete)` guard was circumvented by
choosing the shared handle. `GroupKvHandle` now runs the same before-op hook.
2. Seal to the declaring owner — the marker resolved nearest-owner-wins but its
script name was then re-resolved on the CALLER's chain, so a descendant app
could shadow a group's mandatory guard with a same-named local script.
`resolve_before` now returns the script sealed to the owner that declared the
marker (one LEFT JOIN in manager-core), so the executor never re-resolves by
name. A descendant can only override with its OWN explicit marker.
3. Re-entrancy — an "allow + audit-log" guard that itself wrote KV re-triggered
itself to the depth cap and then DENIED the original write (plus ~8x
resolve/compile/execute amplification). A thread-local guard makes a write
performed by an interceptor bypass interception.
4. Fail-closed verdict — only `#{ allowed: false }` denied; a bare bool, a
typo'd key, a non-bool, or a bare unit all ALLOWED. Now allow ONLY on an
explicit `#{ allowed: true }`; every other shape denies.
5/6. Fail-closed edges — a dangling (missing/disabled) interceptor script and a
missing engine back-reference now DENY instead of allowing.
7. AppInvoke coupling — resolution no longer routes through `invoke.resolve`, so
installing a guard no longer denies writes to principals who hold KV-write
but not AppInvoke.
The seam (`InterceptorService::resolve_before`) now returns an
`InterceptorResolution { None | Dangling | Run(ResolvedScript) }`; the executor
runs the sealed script straight through the shared `run_resolved_blocking` core
and drops its `InvokeService` dependency. executor-core stays Postgres-free.
No migration change (0073 unchanged).
Pinned by three new journeys in tests/interceptors.rs: the seal (a same-named
app script does NOT shadow the group's guard), shared-collection coverage, and
the fail-closed verdict. Full journey suite 157/157.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
PiCloud
A lightweight, self-hosted, event-driven serverless compute platform. Upload a Rhai script, get an HTTP endpoint. Designed to run on a single modest server with no idle CPU cost, and to scale out to a small cluster when you need it.
Status: Phase 1 — MVP scaffolding in progress.
The authoritative design lives in
serverless_cloud_blueprint.md.
Why
Existing serverless platforms are either cloud-locked, heavyweight, or both. PiCloud aims for the opposite end of the spectrum: one binary, one database, one reverse proxy — running on hardware you already own.
Architecture (one paragraph)
PiCloud splits into three logical services — manager (control plane: scripts, schedules, dashboard), orchestrator (per-node event ingress and dispatch), and executor (per-node Rhai sandbox) — each backed by a *-core Rust library. In MVP they run in a single process; in cluster mode they run as three binaries with one manager and one orchestrator + executor per node. Caddy fronts everything; PostgreSQL is the single source of truth.
See CLAUDE.md for working notes and serverless_cloud_blueprint.md for the full design.
Quick Start
Coming as scaffolding lands. For now:
# Rust toolchain (pinned via rust-toolchain.toml)
cargo check --workspace
# Run the all-in-one MVP binary (once main.rs is wired up)
cargo run -p picloud
Repository Layout
crates/
shared/ cross-cutting types
executor-core/ Rhai engine + sandbox
orchestrator-core/ event ingress, dispatch
manager-core/ control plane
picloud/ MVP all-in-one binary
picloud-{manager,orchestrator,executor}/ cluster-mode binaries (skeleton)
dashboard/ SvelteKit
caddy/ Caddyfile
docker/ Dockerfiles
docs/
git-workflow.md Trunk-based workflow
Contributing
See docs/git-workflow.md for the branching and commit conventions. TL;DR: trunk-based, short-lived branches, Conventional Commits, no force-pushing main.
License
TBD.