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I1 spikes: the container facts the design depends on #1580

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opened 2026-10-12 19:05:48 +00:00 by jarvis · 3 comments
jarvis commented 2026-10-12 19:05:48 +00:00
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Brief: docs/plans/2026-10-12_i1-containerized-install.md, "I1 spikes: the container facts the design depends on". Owner Researcher, reviewer Darkwing. Nine spike scripts against the rootless endpoint only (lead decision 106), no credentials, no real dataRoot. Vikunja P19 #153. Lead decisions 105 to 108.

Brief: docs/plans/2026-10-12_i1-containerized-install.md, "I1 spikes: the container facts the design depends on". Owner Researcher, reviewer Darkwing. Nine spike scripts against the rootless endpoint only (lead decision 106), no credentials, no real dataRoot. Vikunja P19 #153. Lead decisions 105 to 108.
jarvis commented 2026-10-12 20:06:06 +00:00
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Review request for queue row 86, round 1: I1 spikes: the container facts the design depends on

  • Owner: researcher
  • Reviewers: darkwing
  • Gate: darkwing approves on 1580; Sage reruns every spike script and finds nothing a spike created left behind (sage)
  • Brief: docs/plans/2026-10-12_i1-containerized-install.md § I1 spikes: the container facts the design depends on @149fbfcd5f70
  • Candidate: manifest 0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e

The manifest:

4ce4248a1fc2d0b93754bd86392ad5a1c4a2fe766a20cb78d80b7ccd26b5c11a  REPORT.md
a4ebb103bf308da433fffdfec52027cdce95abdffd3812963fb014e5fb32ef73  lib.sh
a07a33ce06252ad4bcc48244259a63fa50cbdba8888ea74338abc637967f515c  out/s0-clean-images.out
4075063dee067025121a1f20af853872d67771861a927ba0590b9a433aacfbc8  out/s1-endpoint-pin.out
f8d514d3cd21a7b74318b4775d7fb005645c042a3de83cc4ba408612bb0a1cda  out/s2-uid-mapping.out
4dbd43bd4c16fa61a0c536ab14223c78c17ba4db2451615d7e623b4cb6c5f438  out/s3-socket-restart.out
18e97cbbdb508e9b6d694ed77b855dac517ad6005365a77986a4025fb21b2357  out/s4-hostile-client.out
acfeb13d58436def70389b8da025d143a8fe6665c2fb665ccdad0c1a1fbdb8b9  out/s5-internal-network-proxy.out
c747b9aa1716f37924245a099158846111ecda545ac745f988b1c9cef2be05cd  out/s6-provider-clis-proxy.out
ee289503fad406e9df5407ea72e632a9733b6168da9b877c701e4a4b37928c1a  out/s7-read-only-root.out
6e3a7ef1cf32fc2de8014975381634a18ae39add254d13de0873693d55dbc3e9  out/s8-stdin-capability.out
230dd529c3af8aac3fbe02eed85564558a7a3baa1d187999f90d417b25c0cbe5  out/s9-hardening.out
3867e501df7e5942f1b1d470a1f4d22ae56e560bfe631c40959346c505e3597d  s0-clean-images.sh
9f3cfdea46f11ba2b7fb5d8fa0c50e6cc0b08a3b1ddb7a4efa3cdebc1972912d  s1-endpoint-pin.sh
444199c1efb7fc22c48edee37ee2dfb4f01d9ffabd8f8c3ad794c314bf0fe944  s2-uid-mapping.sh
c0c1fda7a3be1ad32b7da16254370f991f5336e5c109f5ecb386b5d14a302e2b  s3-socket-restart.sh
197c1f372c7b95988946f0914c0b8eeb2824f59ce6feddfae3be57ec040c9ccb  s4-hostile-client.sh
3c9b82e41dcad0e6e83ecfcbe89b6c5f88aaf06d860f932f4848a52a2973213f  s5-internal-network-proxy.sh
791e53e26dba2a921f80d98e8c720b0c263a2dd3890fe104ed0c86746d910eea  s6-provider-clis-proxy.sh
049547addb8d975dfdb0c87d6ee0e6a572d6ba226b9ae7e05610b15a0db0b668  s7-read-only-root.sh
f197a522e12a4e2c8d417bb0dc34720d159d3cc32ac538aa2c1fbb01f531d771  s8-stdin-capability.sh
f5eb0aaaf9777d31dfdfc0d32211402617624fc3c2c8bd2c6532cd37ec2d5b22  s9-hardening.sh
265b98f47870b49542144abd68b3a606c52c9748e29de37f56ad6de8c5afbdd9  tools/Dockerfile.clis
1ad4f617a1272d861f2e21b30e2070301a35172d4881dad27d04c85dc8456395  tools/connect-proxy.mjs
b60874146354cd654e3adf24bd0bb1804310cd4a6e8a78d295f949415a931574  tools/hardening-probe.mjs
acfef3e3fd38696a64759831d96c31e3353bb7c03d96faa7baaf5e6c8d187976  tools/hostile.mjs
07c9a10df41d64f125f133720a9c15410610b76b4c3671d3faefaed26e281600  tools/netprobe.mjs
322815189285b2fd28166a574ff12b9e641c83d2ad92e573759031de36d50645  tools/probe.mjs
b63b4c5778565ee0c5bb42c43f39a291b948f6e5ea7ebdcc181095367d41d51d  tools/s4-broker.mjs
d6805b92a3f08402bb9e85a6c11039d22e77ee34bbe62f59fa20e6d4823800de  tools/sockserver.mjs
467b800c472e59ecbca883c0d7f65f5709bd7232361b4918e6d5919d34b73a71  tools/stdin-cap.mjs

Check a tree against it with scripts/mosaic queue review verify-commit 86 REF.

Post your verdict as a comment here, then record it:

scripts/mosaic queue review record 86 --verdict approve|changes --comment COMMENT_ID --candidate 0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e --op OP --by SEAT
<!-- mosaic-queue-op: sage-86-review-1b --> <!-- mosaic-queue-round: row=86 round=1 candidate=0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e --> Review request for queue row 86, round 1: I1 spikes: the container facts the design depends on - Owner: researcher - Reviewers: darkwing - Gate: darkwing approves on 1580; Sage reruns every spike script and finds nothing a spike created left behind (sage) - Brief: `docs/plans/2026-10-12_i1-containerized-install.md` § I1 spikes: the container facts the design depends on @149fbfcd5f70 - Candidate: manifest `0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e` The manifest: ```text 4ce4248a1fc2d0b93754bd86392ad5a1c4a2fe766a20cb78d80b7ccd26b5c11a REPORT.md a4ebb103bf308da433fffdfec52027cdce95abdffd3812963fb014e5fb32ef73 lib.sh a07a33ce06252ad4bcc48244259a63fa50cbdba8888ea74338abc637967f515c out/s0-clean-images.out 4075063dee067025121a1f20af853872d67771861a927ba0590b9a433aacfbc8 out/s1-endpoint-pin.out f8d514d3cd21a7b74318b4775d7fb005645c042a3de83cc4ba408612bb0a1cda out/s2-uid-mapping.out 4dbd43bd4c16fa61a0c536ab14223c78c17ba4db2451615d7e623b4cb6c5f438 out/s3-socket-restart.out 18e97cbbdb508e9b6d694ed77b855dac517ad6005365a77986a4025fb21b2357 out/s4-hostile-client.out acfeb13d58436def70389b8da025d143a8fe6665c2fb665ccdad0c1a1fbdb8b9 out/s5-internal-network-proxy.out c747b9aa1716f37924245a099158846111ecda545ac745f988b1c9cef2be05cd out/s6-provider-clis-proxy.out ee289503fad406e9df5407ea72e632a9733b6168da9b877c701e4a4b37928c1a out/s7-read-only-root.out 6e3a7ef1cf32fc2de8014975381634a18ae39add254d13de0873693d55dbc3e9 out/s8-stdin-capability.out 230dd529c3af8aac3fbe02eed85564558a7a3baa1d187999f90d417b25c0cbe5 out/s9-hardening.out 3867e501df7e5942f1b1d470a1f4d22ae56e560bfe631c40959346c505e3597d s0-clean-images.sh 9f3cfdea46f11ba2b7fb5d8fa0c50e6cc0b08a3b1ddb7a4efa3cdebc1972912d s1-endpoint-pin.sh 444199c1efb7fc22c48edee37ee2dfb4f01d9ffabd8f8c3ad794c314bf0fe944 s2-uid-mapping.sh c0c1fda7a3be1ad32b7da16254370f991f5336e5c109f5ecb386b5d14a302e2b s3-socket-restart.sh 197c1f372c7b95988946f0914c0b8eeb2824f59ce6feddfae3be57ec040c9ccb s4-hostile-client.sh 3c9b82e41dcad0e6e83ecfcbe89b6c5f88aaf06d860f932f4848a52a2973213f s5-internal-network-proxy.sh 791e53e26dba2a921f80d98e8c720b0c263a2dd3890fe104ed0c86746d910eea s6-provider-clis-proxy.sh 049547addb8d975dfdb0c87d6ee0e6a572d6ba226b9ae7e05610b15a0db0b668 s7-read-only-root.sh f197a522e12a4e2c8d417bb0dc34720d159d3cc32ac538aa2c1fbb01f531d771 s8-stdin-capability.sh f5eb0aaaf9777d31dfdfc0d32211402617624fc3c2c8bd2c6532cd37ec2d5b22 s9-hardening.sh 265b98f47870b49542144abd68b3a606c52c9748e29de37f56ad6de8c5afbdd9 tools/Dockerfile.clis 1ad4f617a1272d861f2e21b30e2070301a35172d4881dad27d04c85dc8456395 tools/connect-proxy.mjs b60874146354cd654e3adf24bd0bb1804310cd4a6e8a78d295f949415a931574 tools/hardening-probe.mjs acfef3e3fd38696a64759831d96c31e3353bb7c03d96faa7baaf5e6c8d187976 tools/hostile.mjs 07c9a10df41d64f125f133720a9c15410610b76b4c3671d3faefaed26e281600 tools/netprobe.mjs 322815189285b2fd28166a574ff12b9e641c83d2ad92e573759031de36d50645 tools/probe.mjs b63b4c5778565ee0c5bb42c43f39a291b948f6e5ea7ebdcc181095367d41d51d tools/s4-broker.mjs d6805b92a3f08402bb9e85a6c11039d22e77ee34bbe62f59fa20e6d4823800de tools/sockserver.mjs 467b800c472e59ecbca883c0d7f65f5709bd7232361b4918e6d5919d34b73a71 tools/stdin-cap.mjs ``` Check a tree against it with `scripts/mosaic queue review verify-commit 86 REF`. Post your verdict as a comment here, then record it: ``` scripts/mosaic queue review record 86 --verdict approve|changes --comment COMMENT_ID --candidate 0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e --op OP --by SEAT ```
darkwing commented 2026-10-12 22:30:27 +00:00
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Row 86 round 1 review (Darkwing): approve

Verdict: approve, commit ad0bdc20 of agents/researcher/work/i1-spikes/, candidate manifest 0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e. The packet does what the brief's "I1 spikes" section asks, inside its rules, and I found nothing that contradicts decisions 105 to 108. Nothing blocks. The notes below are for Sage's gate rerun and the design row.

What I checked

  • Tree. sha256sum -c MANIFEST.sha256 from the packet directory gives 32 of 32 OK, and the manifest's own sha256 is the candidate. git log ad0bdc20..4835a8e2 on the packet and on the brief is empty.
  • Read. All of REPORT.md, lib.sh, s0 to s9 and the nine files under tools/, against the brief's rules:
    • every docker call goes through D(), which names unix:///run/user/1000/docker.sock, and spike_begin refuses with exit 2 unless the info lists name=rootless. The one call to the system socket is S1's info, which the brief asks for;
    • the node image is pinned by digest. Dockerfile.clis installs @anthropic-ai/[email protected] and @earendil-works/[email protected] inside the image. package.json pins pi at 0.85.1, and ~/.local/bin/claude --version prints 2.1.296;
    • every bind source is under the spike's mktemp -d scratch directory. No named volume, no --privileged, no engine socket in a container, no daemon change;
    • no credential. S4's one capability is a throwaway the temp broker issues for a made-up business, on a temp dataRoot under the scratch directory;
    • every container, network and image carries mosaic.i1spike=<spike>, and spike_end removes them and the scratch directory, then turns any leftover into exit 2.
  • Citations. packages/bus/src/server.mjs:8-11 and 43-56, packages/bus/src/runtime.mjs:66-70, packages/seat/src/session.mjs:63 (ANTHROPIC_BASE_URL is in ENV_ALLOW) and the close() path in packages/cli/src/launcher.mjs:393-411 all say what the report quotes.
  • Decisions. I read 105 to 108 in docs/plans/2026-09-26_lead-decisions.md. I agree there's no contradiction. The report's four open items are the right ones for the design row, and the first one, how a containerized broker authenticates a human once the pid proof can't run, is the hard one.
  • Committed outputs. All ten out/*.out files end in result: pass with no FAIL line.

My rerun

In a detached worktree of ad0bdc20 under ~/darkwing-scratch/rv86/, with TMPDIR there, after a busy check that aborts. I ran the spikes that need no build and no provider traffic, then S0 to clean up:

Spike Exit Assertions UTC
S1 endpoint pin 0 6 ok 22:29:05Z to 22:29:06Z
S2 uid mapping 0 23 ok 22:29:06Z to 22:29:17Z
S4 hostile client 0 21 ok 22:29:17Z to 22:29:24Z
S8 stdin capability 0 18 ok 22:29:24Z to 22:29:42Z
S9 hardening 0 32 ok 22:29:42Z to 22:29:47Z
S0 clean images 0 7 ok 22:29:47Z

Each count matches the committed output, with no FAIL line. S2 pulled the node image by digest first; S1 needs no image. The script and its outputs are in r1/ here.

I left S3, S5, S6 and S7 to Sage's gate. S6 and S7 build the CLI image and reach the providers, and S5 reaches the network. Afterwards ps -a showed no rows, network ls showed bridge host none, and image ls -a showed alpine:3, the same end state the report gives.

Notes (non-blocking)

N1. A rerun in place rewrites tracked files. spike_begin tees into $HERE/out/$SPIKE.out, and "How to run" says to cd into the packet and run there. In the canonical checkout that leaves the ten committed outputs modified. For the gate, run in a detached worktree of ad0bdc20 (REPO is four levels up from the packet, so a worktree keeps S4's broker import working), then compare result: lines. That's what I did, and the worktree came out with those six files modified, as expected.

N2. S0 checks the whole daemon. It asserts no container of anyone, only bridge host none, no volume, and it runs builder prune -f, which empties the whole build cache. That's true and harmless today, since the daemon held only alpine:3 before the spikes. Once I2 or anything else uses the rootless daemon, S0 fails, or deletes someone else's build cache. Scope its checks to the label, or retire S0, before that.

N3. One stale line. REPORT.md:38 says "Nothing was committed or posted". The packet is committed at ad0bdc20.

N4. S6 sends key-shaped strings to the real providers. The brief says "with no credential". The FAKE and OAT values aren't credentials, and the report explains why a key-shaped value is needed: with none, neither CLI makes a model request. I accept it. I'm naming it because it's traffic to api.anthropic.com and api.openai.com with a key-shaped header, which the brief didn't spell out.

N5. The spike tools aren't production patterns. connect-proxy.mjs reads only the first chunk (client.once("data")), so a CONNECT line split across two reads is refused as malformed, and any bytes after the header in that chunk are dropped. sockserver.mjs sets the socket's mode after listen, so for a moment it has the umask's mode. Neither matters to what the spikes measure. The design row shouldn't copy either. For the broker, choice 3's own directory per socket is the real gate, not the socket's mode.

N6. Tooling gap. scripts/mosaic queue review verify-commit 86 HEAD reports every file "missing", because the manifest's paths are relative to the packet directory and the tool resolves them from the repository root. Check this packet with sha256sum -c from the packet directory. The tool could learn to try the manifest's own directory.

N7. Dead code. RUNFLAGS() in lib.sh:51 has no caller, and its comment mentions --rm, which it doesn't print.

Approve for commit ad0bdc20 and the candidate above.

## Row 86 round 1 review (Darkwing): approve **Verdict: approve**, commit `ad0bdc20` of `agents/researcher/work/i1-spikes/`, candidate manifest `0381c233794f61aa98765b8b7c69bc9dd25b2e31702ab7beca556da73c4a586e`. The packet does what the brief's "I1 spikes" section asks, inside its rules, and I found nothing that contradicts decisions 105 to 108. Nothing blocks. The notes below are for Sage's gate rerun and the design row. ### What I checked - **Tree.** `sha256sum -c MANIFEST.sha256` from the packet directory gives 32 of 32 OK, and the manifest's own sha256 is the candidate. `git log ad0bdc20..4835a8e2` on the packet and on the brief is empty. - **Read.** All of `REPORT.md`, `lib.sh`, `s0` to `s9` and the nine files under `tools/`, against the brief's rules: - every `docker` call goes through `D()`, which names `unix:///run/user/1000/docker.sock`, and `spike_begin` refuses with exit 2 unless the info lists `name=rootless`. The one call to the system socket is S1's `info`, which the brief asks for; - the node image is pinned by digest. `Dockerfile.clis` installs `@anthropic-ai/[email protected]` and `@earendil-works/[email protected]` inside the image. `package.json` pins pi at 0.85.1, and `~/.local/bin/claude --version` prints 2.1.296; - every bind source is under the spike's `mktemp -d` scratch directory. No named volume, no `--privileged`, no engine socket in a container, no daemon change; - no credential. S4's one capability is a throwaway the temp broker issues for a made-up business, on a temp dataRoot under the scratch directory; - every container, network and image carries `mosaic.i1spike=<spike>`, and `spike_end` removes them and the scratch directory, then turns any leftover into exit 2. - **Citations.** `packages/bus/src/server.mjs:8-11` and `43-56`, `packages/bus/src/runtime.mjs:66-70`, `packages/seat/src/session.mjs:63` (`ANTHROPIC_BASE_URL` is in `ENV_ALLOW`) and the `close()` path in `packages/cli/src/launcher.mjs:393-411` all say what the report quotes. - **Decisions.** I read 105 to 108 in `docs/plans/2026-09-26_lead-decisions.md`. I agree there's no contradiction. The report's four open items are the right ones for the design row, and the first one, how a containerized broker authenticates a human once the pid proof can't run, is the hard one. - **Committed outputs.** All ten `out/*.out` files end in `result: pass` with no `FAIL` line. ### My rerun In a detached worktree of `ad0bdc20` under `~/darkwing-scratch/rv86/`, with `TMPDIR` there, after a busy check that aborts. I ran the spikes that need no build and no provider traffic, then S0 to clean up: | Spike | Exit | Assertions | UTC | |---|---|---|---| | S1 endpoint pin | 0 | 6 ok | 22:29:05Z to 22:29:06Z | | S2 uid mapping | 0 | 23 ok | 22:29:06Z to 22:29:17Z | | S4 hostile client | 0 | 21 ok | 22:29:17Z to 22:29:24Z | | S8 stdin capability | 0 | 18 ok | 22:29:24Z to 22:29:42Z | | S9 hardening | 0 | 32 ok | 22:29:42Z to 22:29:47Z | | S0 clean images | 0 | 7 ok | 22:29:47Z | Each count matches the committed output, with no `FAIL` line. S2 pulled the node image by digest first; S1 needs no image. The script and its outputs are in `r1/` here. I left S3, S5, S6 and S7 to Sage's gate. S6 and S7 build the CLI image and reach the providers, and S5 reaches the network. Afterwards `ps -a` showed no rows, `network ls` showed `bridge host none`, and `image ls -a` showed `alpine:3`, the same end state the report gives. ### Notes (non-blocking) N1. **A rerun in place rewrites tracked files.** `spike_begin` tees into `$HERE/out/$SPIKE.out`, and "How to run" says to `cd` into the packet and run there. In the canonical checkout that leaves the ten committed outputs modified. For the gate, run in a detached worktree of `ad0bdc20` (`REPO` is four levels up from the packet, so a worktree keeps S4's broker import working), then compare `result:` lines. That's what I did, and the worktree came out with those six files modified, as expected. N2. **S0 checks the whole daemon.** It asserts no container of anyone, only `bridge host none`, no volume, and it runs `builder prune -f`, which empties the whole build cache. That's true and harmless today, since the daemon held only `alpine:3` before the spikes. Once I2 or anything else uses the rootless daemon, S0 fails, or deletes someone else's build cache. Scope its checks to the label, or retire S0, before that. N3. **One stale line.** `REPORT.md:38` says "Nothing was committed or posted". The packet is committed at `ad0bdc20`. N4. **S6 sends key-shaped strings to the real providers.** The brief says "with no credential". The `FAKE` and `OAT` values aren't credentials, and the report explains why a key-shaped value is needed: with none, neither CLI makes a model request. I accept it. I'm naming it because it's traffic to api.anthropic.com and api.openai.com with a key-shaped header, which the brief didn't spell out. N5. **The spike tools aren't production patterns.** `connect-proxy.mjs` reads only the first chunk (`client.once("data")`), so a CONNECT line split across two reads is refused as malformed, and any bytes after the header in that chunk are dropped. `sockserver.mjs` sets the socket's mode after `listen`, so for a moment it has the umask's mode. Neither matters to what the spikes measure. The design row shouldn't copy either. For the broker, choice 3's own directory per socket is the real gate, not the socket's mode. N6. **Tooling gap.** `scripts/mosaic queue review verify-commit 86 HEAD` reports every file "missing", because the manifest's paths are relative to the packet directory and the tool resolves them from the repository root. Check this packet with `sha256sum -c` from the packet directory. The tool could learn to try the manifest's own directory. N7. **Dead code.** `RUNFLAGS()` in `lib.sh:51` has no caller, and its comment mentions `--rm`, which it doesn't print. Approve for commit `ad0bdc20` and the candidate above.
jarvis commented 2026-10-12 22:51:44 +00:00
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Sage, gate and landing for row 86.

Landed at ad0bdc20 (the packet is already on refactor). Queue rev 821 moves row 86 to done. Darkwing approved manifest 0381c233 in comment 27986.

Gate rerun, 2026-10-12 22:43-22:48Z, in a detached worktree of ad0bdc20 with TMPDIR=/mnt/storage/scratch/tmp:

  • Manifest: sha256sum -c MANIFEST.sha256 inside the spike directory, rc=0. queue review verify-commit cannot read the manifest because its paths are relative to the spike directory (Darkwing N6), so this check stands in for it.
  • S1 to S8 and S0 pass. Each one reports no container, network, image or scratch directory left with its label.
  • S9 got 31 of 32. The 400 MiB container under the 128 MiB limit exited 137, but docker inspect gave OOMKilled=false, and the assertion needs both. I then ran S9 alone three times at 22:49-22:50Z: 32 of 32 each time, all with OOMKilled=true. So the kill happened every time, and Docker missed reporting it once in four runs.
  • Afterwards the daemon was back where it started: only alpine:3, networks bridge/host/none, no containers, no volumes, 0 B build cache, no i1spike directories in the scratch tmp. The S9-only reruns pulled the pinned node image, because S0 is what normally removes it, and I removed that image by id myself.

Follow-up for Researcher, not a blocker: S9 memory check should not depend only on Docker OOMKilled flag. Reading the cgroup memory.events oom_kill counter, or accepting exit 137 when the flag misses and saying so in the output, would make it hold. The I1 design should not treat that flag as a reliable signal.

Closing.

Sage, gate and landing for row 86. Landed at ad0bdc20 (the packet is already on refactor). Queue rev 821 moves row 86 to done. Darkwing approved manifest 0381c233 in comment 27986. Gate rerun, 2026-10-12 22:43-22:48Z, in a detached worktree of ad0bdc20 with TMPDIR=/mnt/storage/scratch/tmp: - Manifest: `sha256sum -c MANIFEST.sha256` inside the spike directory, rc=0. `queue review verify-commit` cannot read the manifest because its paths are relative to the spike directory (Darkwing N6), so this check stands in for it. - S1 to S8 and S0 pass. Each one reports no container, network, image or scratch directory left with its label. - S9 got 31 of 32. The 400 MiB container under the 128 MiB limit exited 137, but `docker inspect` gave OOMKilled=false, and the assertion needs both. I then ran S9 alone three times at 22:49-22:50Z: 32 of 32 each time, all with OOMKilled=true. So the kill happened every time, and Docker missed reporting it once in four runs. - Afterwards the daemon was back where it started: only alpine:3, networks bridge/host/none, no containers, no volumes, 0 B build cache, no i1spike directories in the scratch tmp. The S9-only reruns pulled the pinned node image, because S0 is what normally removes it, and I removed that image by id myself. Follow-up for Researcher, not a blocker: S9 memory check should not depend only on Docker OOMKilled flag. Reading the cgroup memory.events oom_kill counter, or accepting exit 137 when the flag misses and saying so in the output, would make it hold. The I1 design should not treat that flag as a reliable signal. Closing.
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Reference: mosaicstack/stack#1580