The minimal build-capable CLI decided in RFC 0002's outcome: stdlib-only
Go module, one static binary.
- engine: RunSpec behind the Engine interface (RFC 0001); the Bwrap
engine ports Werkator's hardened invocation — uid-0 mapping, read-only
rootfs at /, proc/dev/tmp/root before the user binds so binds below
them land inside, mountpoint pre-creation in the rootfs including file
mountpoints, and a guard against binds escaping the rootfs. --clearenv
gives docker-style clean environments (HOME/PATH set explicitly).
- store: images under $WERKDOCK_HOME (default ~/.werkdock), load
unpacks via the tar CLI into a tmp dir and renames atomically.
- cli: docker-shaped run flags (-v/-e/-w/--rm); refused docker flags
(-p, --network, --memory, --cpus, --user, -d) fail loudly with the
reason; exit codes follow docker (125 CLI errors, child code through).
- doctor: port of werkator-build-prerequisites.sh — userns probe with
the three signals, tar/zstd, free space and group-quota headroom via
testable df/quota parsers, same PASS/FAIL output.
- tests: argv golden test, mountpoint and escape tests, flag refusals,
store round trip, doctor parsers — plus real-sandbox integration
tests that skip where bwrap or userns are unavailable.
Also records in step 21: RFC 0002 levels 2/3 deferred; next goal is
sandbox builds of Werkator, Werkbaum, and Werkdock itself.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Level 1: docker-compatible CLI (verbs, flags, loud refusal of isolation
flags the filesystem-only contract cannot honor) — built in session B.
Level 2: OCI image pull, flattened to a rootfs — deferred, stdlib-doable.
Level 3: a daemon speaking the Docker Engine API subset Testcontainers
actually uses (Testcontainers never calls the CLI) — deferred, but the
CLI is built as a thin frontend over the same internal service from the
start. Records the port-mapping crux of host networking and the
unprivileged-netns escape hatch as a future RFC.
Step 21 session B and the werkdock README follow the docker-shaped
semantics: run takes an image, instances correspond to containers.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The full five-way evaluation (bash, Python 3, Kotlin Native, Rust, Go)
with the numeric scoring, the Kotlin Native deep-dive, and the
own-namespaces-instead-of-bwrap analysis, ending in a concrete proposal:
Go, stdlib-only, one static binary, sandbox engine behind an interface
so bwrap can later be swapped for native namespaces.
Status proposed — the decision outcome is recorded once made.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Records where the bwrap work (PR #4) drifted from the intent of ADR 0006 —
the webspace self-build instead of local-build-plus-install — and breaks the
correction into four sessions: close step 17's open ends, bootstrap Werkdock,
let Werkator consume it, replace the self-build with the bundle install path.
The extracted sandbox tool is named Werkdock (decided after three naming
rounds, rationale and dropped candidates in the step file). It grows in the
werkdock/ subdirectory, seeded here with its README, and moves to its own
repository once it stands on its own.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
