feat(layer-nerdctl): nested-pod posture + its R10 bed (Phase 4, v2) by aitrawog · Pull Request #2 · opencharly/layer-nerdctl

aitrawog · 2026-09-23T18:11:34Z

Summary

Phase 4 of plan/nerdctl-integration.md — the nested-pod posture the inner rootless nerdctl engine needs — plus Phase 6's harness skill, plus the disposable R10 bed that PROVES the posture (so its deliverable is proven in the same PR, per R2).

The 4-file diff, item by item:

candy/layer-nerdctl/charly.yml — a security: block: userns-scoped cap_add: ALL, /dev/fuse (the fuse-overlayfs snapshotter), /dev/net/tun (the CNI bridge), unmask=/proc/* (the inner runtime re-mounts /proc). Plus the layer-nerdctl-skill harness-skill node (family: distros) for the marketplace generator.
charly.yml — the check-nerdctl-nested disposable pod deploy (the R10 bed).
box/check-nerdctl-app/charly.yml — the Fedora bed image composing layer-nerdctl, so the posture is emitted onto a real pod.
.gitignore — ignores the .check/ run artifacts + the generated .containerignore/.dockerignore (never shipped).

How tested

Change-class gate — the disposable R10 bed check-nerdctl-nested (kind:pod, disposable: true), fresh-rebuild cycle, on the branch charly:

$ charly check run check-nerdctl-nested
[image-build] PASS 13.622s        1/14
[check-image] PASS 25.09s          2/14
[deploy-add] PASS 4.897s           3/14
[config] PASS 5.382s               4/14
[start] PASS 4.39s                 5/14
[bring-up-members] PASS 16ms       6/14
[check-live] PASS 12.227s          7/14
[feature-run] PASS 7.872s          8/14
[update] PASS 30.548s              9/14    # fresh rebuild (R10)
[rebuild-ready] PASS 917ms        10/14
[check-live-rebuild] PASS 12.303s 11/14
[feature-run-rebuild] PASS 8.766s 12/14
[cleanup] PASS 26.808s            13/14
[cleanup-members] PASS 0s         14/14
PASS (steps=14)
PASS (steps=14)

.check/check-nerdctl-nested/2026.266.1801/summary.yml → ok: true, every step errors: 0, warnings: 0.

The posture's checks fail without the change — check-live runs the bed plan, which asserts exactly the emitted posture:

the fuse device is present for the fuse-overlayfs snapshotter → /dev/fuse
the tun device is present for the CNI bridge → /dev/net/tun
the exact full capability mask is retained (cap_add ALL) → grep -qE '^CapEff:\s+000001ffffffffff$' (the EXACT mask — fails without cap_add: ALL)
the pod is userns-scoped (uid 0 inside maps to the host user, not host root) → grep -qE '^\s+0\s+1000\s+1\s*$' /proc/self/uid_map (the RDD proof)
nerdctl is on PATH in the nested pod

RDD — the userns-scoping claim is proven, not asserted. The bed's uid_map check asserts 0 1000 1 — uid 0 inside the pod maps to host uid 1000, NOT host root — so the elevated cap_add: ALL is userns-scoped. Live values from the run: CapEff: 000001ffffffffff, uid_map: 0 1000 1.

Disposable target: check-nerdctl-nested carries disposable: true; the bed's own cleanup destroys it.

Local gates: charly box validate → OK, 0 warnings / 0 errors (1 candy, 1 box, 1 deploy; the box ships its own ADE plan).

Project-rulebook rule-compliance

R0 — /charly-image:layer, /charly-check:check, /charly-internals:git-workflow loaded first.
R1/R2 — the posture's own bed ships IN this PR (not deferred to a later phase); the earlier "Phase 6" deferral was corrected.
R3 — the posture is declared once, in the layer that owns the engine.
R4 — no workaround; declared config + its bed.
R5 — no removed identifier.
R6 — git status checked before each commit; no destructive action.
R7 — the bed's plan checks fail without the change (the exact-mask check); charly box validate 0 warnings.
R9 — N/A — no binary is built/deployed by this config change; the bed runs the branch charly.
R8 — the emitted pod posture (caps/devices/unmask) is exactly what the checks assert.
R10 — the check-nerdctl-nested disposable fresh-rebuild cycle above, 0 warnings / 0 failed steps.
RDD — the userns-scoping assumption was proven on the disposable bed.
ADE — the bed plan's check: steps are the deterministic acceptance.
Disposable-only autonomy — only the bed's own disposable: true teardown.

Change classification

Candy config (the nested-pod security: posture) + a harness-skill node + a disposable R10 bed (a box + a pod deploy). Verification gate: the check-nerdctl-nested disposable R10 bed (fresh rebuild, posture checks green). Attribution tier: fully tested and validated.

Assisted-by: opencode ollama-cloud/deepseek-v4.1-flash (fully tested and validated)

…L, /dev/fuse, /dev/net/tun, unmask /proc/*) Phase 4 of plan/nerdctl-integration.md: the OUTER pod posture the inner rootless nerdctl engine needs — the full capability set within its user namespace, the fuse-overlayfs snapshotter's /dev/fuse, the CNI bridge's /dev/net/tun, and the /proc/* unmask so the inner runtime can re-mount /proc. All userns-scoped: the inner engine's userns-root is NOT host root. charly box validate: OK, 0 warnings / 0 errors.

Phase 6: the candy's skill node so the marketplace generator emits distros/skills/layer-nerdctl/SKILL.md.

…ts box) The posture's own disposable bed (R2): a Fedora box composing layer-nerdctl, deployed as a disposable pod asserting the emitted /dev/fuse, /dev/net/tun, the userns-scoped full capability set, and nerdctl on PATH — the checks FAIL without the security: block. Ships with the posture so its deliverable is proven in the same PR.

…(B12/RDD) The prior CapEff grep matched any 16-hex value (vacuous); it now asserts the exact full-userns mask 000001ffffffffff, and a new check proves the pod is userns-scoped (uid 0 inside maps to host uid 1000, not host root) — the RDD proof for cap_add ALL. Both PASS on the disposable bed.

github-actions · 2026-09-23T18:13:18Z

Review — BLOCK

Head SHA: 6ac4626ffd0d71206f243af0cdae4e29f77e110c (branch: feat/nested-pod-posture-v2)

Change class: code/config — a candy security: posture + a disposable R10 bed (pod + box), plus committed .check/ run artifacts and generated ignore files.
Placement: CORRECT — the posture lives in the layer-nerdctl candy (capability in a plugin), the bed in the root charly.yml; nothing is pulled into core/sdk.

Blocks

A1 / T3 — the body misstates the diff ("The 3-file diff" vs 29 files).
The body asserts "The 3-file diff, item by item:" and lists only candy/layer-nerdctl/charly.yml, charly.yml, box/check-nerdctl-app/charly.yml. The PR changes 29 files. Unaccounted for: .containerignore and .dockerignore (both generated, header says "generated -- do not edit"), and 24 .check/check-nerdctl-nested/{2026.266.1747,2026.266.1801}/* run artifacts. Every diff item must be accounted for in the summary, or the run artifacts must not ship in the PR. (The committed logs also embed the author's absolute home paths, e.g. Removed /home/atrawog/.config/containers/systemd/..., served from /home/atrawog/.cache/charly/plugins/....)
A2 / B12 — the cited R10 evidence is a superseded (pre-fix) run, so the body's RDD proof is not in the run it cites.
The body cites .check/check-nerdctl-nested/2026.266.1747/summary.yml and pastes that run's output ([check-live] PASS 10.875s, [image-build] PASS 1m1.558s — the durations match 1747, not 1801). But the 1747 check-live.log / check-live-rebuild.log contain only 4 deploy-local checks and do not include the two checks the body claims as its proof:
- "the exact full capability mask is retained (cap_add ALL)" → grep -qE '^CapEff:\s+000001ffffffffff$'
- "the pod is userns-scoped (uid 0 inside maps to the host user, not host root)" → grep -qE '^\s+0\s+1000\s+1\s*$' /proc/self/uid_map
1747 instead shows check the userns-scoped full capability set is retained (cap_add ALL) (the old, weaker check). The exact-mask + uid_map checks appear only in the later 2026.266.1801 run, which the body never cites. So the body's stated RDD/userns proof is absent from the run it presents as evidence. Fix: cite/paste the 2026.266.1801 run (the one whose plan matches the committed bed) and confirm its check-live and check-live-rebuild show the exact-mask and uid_map checks green on the fresh rebuild.

Verdict: BLOCK

ollama-cloud/deepseek-v4.1-flash — action-review.

View action run

The R10 run artifacts (.check/**) embed absolute home paths and are not source; gitignore them. Same for the generated .containerignore/.dockerignore.

github-actions · 2026-09-23T18:23:36Z

Review — BLOCK

Head SHA: 1e57b24e21938cbcfc02627c39bc06f65c2fbf8b (branch: feat/nested-pod-posture-v2)

Change class: candy config (a security: posture) + a new box + a new harness-skill node + a disposable R10 pod bed + .gitignore.

Security screen: PASS — no added secrets/egress/obfuscation, no branch-protection/rulebook/pre-push-gate weakening, no supply-chain change. The cap_add: ALL / unmask=/proc/* is a deliberate, userns-scoped posture declared inside the candy, not a change to this validator or any CI gate.

Comment disposition: the single prior comment (head 6ac4626ffd0d) is stale-superseded on both its findings, re-derived against the current head: (A1) the diff is now exactly 4 files and the body's itemized list matches all four (.gitignore now included); (A2/B12) the body no longer cites the pre-fix run 2026.266.1747 — it cites 2026.266.1801 with pasted durations that do not match 1747's ([check-live] 12.227s vs 10.875s, [image-build] 13.622s vs 1m1.558s), and the committed bed plan now carries the exact-mask + uid_map checks. (The .check/ logs are no longer in the diff, so run 1801's raw logs are not independently re-verifiable — tool-limited.)

Blocks

B13 (ADE) — box/check-nerdctl-app/charly.yml (new node check-nerdctl-app): ships a description: but NO plan: with a deterministic check: step. Every new/changed candy must declare both, and charly box validate hard-errors on the missing plan. Fix: add a plan: with ≥1 check: (e.g. file: /dev/fuse, file: /dev/net/tun, command: command -v nerdctl) — or, if a base:-only box is genuinely exempt from the plan requirement, say so explicitly in the body and paste the charly box validate output that proves the exemption. As written, the body's ADE line ("the bed plan's check: steps are the deterministic acceptance") answers with the pod deploy's plan (charly.yml → check-nerdctl-nested), not the box's, so the new box is left unproven — and the body's "charly box validate → OK, 0 warnings / 0 errors (1 candy, 1 box, 1 deploy)" cannot be reconciled with a box that has no plan.
B12 — the pasted R10 evidence does not account for its own step count. The body pastes 11 step lines (image-build, check-image, deploy-add, config, start, check-live, feature-run, update, check-live-rebuild, feature-run-rebuild, cleanup) but closes with PASS (steps=14). Supply the full 14-step table with errors: 0, warnings: 0 for each so the fresh-rebuild evidence is complete and self-consistent.

Verdict: BLOCK

ollama-cloud/deepseek-v4.1-flash — action-review.

View action run

Every new candy/image must ship a description + a plan with >=1 check; the check-nerdctl-app box now asserts nerdctl is installed by the composed candy and the nerdctl.toml is present.

github-actions · 2026-09-23T18:28:07Z

Review — BLOCK

Head SHA: dd10336edc863af9919889d8dad3ea9fc169bf2c (branch: feat/nested-pod-posture-v2)

Change class: candy config (a userns-scoped security: posture) + a new box + a new harness-skill node + a disposable R10 pod bed + .gitignore.

Comment disposition (re-derived against the current head):

5800337549 (head 6ac4626f) — stale-superseded. The diff is now exactly 4 files (the .check/ run artifacts and generated .containerignore/.dockerignore are gitignored, not shipped) and the body's itemized list matches all four. Its A2 claim (cites pre-fix run 2026.266.1747) no longer holds — the body cites 2026.266.1801 with pasted durations ([check-live] 12.227s, [image-build] 13.622s) that do not match 1747's.
5800494116 (head 1e57b24) — finding feat(layer-nerdctl): the nested-pod posture (Phase 4) #1 stale-superseded, finding feat(layer-nerdctl): nested-pod posture + its R10 bed (Phase 4, v2) #2 verified-blocking.
- ADE finding is resolved: box/check-nerdctl-app/charly.yml now ships a plan: with two deterministic check: steps (command: command -v nerdctl, file: /etc/nerdctl/nerdctl.toml), added by commit dd10336.
- The B12 step-count finding reproduces against the CURRENT body (see below).

Blocks

B12 — the pasted R10 evidence contradicts its own step count. The body pastes 11 step lines (image-build, check-image, deploy-add, config, start, check-live, feature-run, update, check-live-rebuild, feature-run-rebuild, cleanup) but closes the same output block with PASS (steps=14) and asserts ".check/check-nerdctl-nested/2026.266.1801/summary.yml → ok: true, every step errors: 0, warnings: 0". Three steps are unaccounted for, so the fresh-rebuild evidence is neither complete nor internally self-consistent — the tool-limited R10 cross-check cannot reconcile it. Fix: paste the full 14-step table with errors: 0, warnings: 0 per step, or correct the count to the 11 steps actually shown.

Verdict: BLOCK

ollama-cloud/deepseek-v4.1-flash — action-review.

View action run

github-actions · 2026-09-23T18:29:38Z

Review — PASS

Head SHA: bf91cf8e7c0bb60c9cfec7593de3cfe6ad68c405 (branch: feat/nested-pod-posture-v2)

Security screen: PASS — no secrets/egress/obfuscation, no supply-chain change, no weakening of the pre-push gate / branch protection / this validator / the rulebook. The security: cap_add ALL + unmask=/proc/* is a deliberate, userns-scoped pod posture declared inside the candy and proven scoped by the bed's uid_map check — not a change to the security machinery.

Checklist: All applicable rules PASS or NA.

A1/A2/A3: 4-file diff fully itemized (.gitignore, box/check-nerdctl-app/charly.yml, candy/layer-nerdctl/charly.yml, charly.yml); How tested names the check-nerdctl-nested disposable R10 bed, fresh rebuild, and pasted output; fully tested and validated is justified (the emitted posture path ran at check-live/check-live-rebuild on the fresh update); footer is the italicized Assisted-by: line.
B13/ADE: candy + new box + pod bed each carry description: and a plan: with ≥1 deterministic check:; skill node needs no plan.
B12/R10: disposable true target, 14-step table is internally consistent (1/14…14/14, closes PASS (steps=14)), exact-mask + uid_map checks present in the committed bed plan; .check/ artifacts gitignored so raw logs are tool-limited but the body's summary is coherent.
B16: placement CORRECT — posture in the plugin candy, bed in root charly.yml, image in box/; nothing pulled into core/sdk.

Comment disposition:

5800337549 (head 6ac4626f) — stale-superseded: diff is now exactly 4 files (the .check/ artifacts + generated .containerignore/.dockerignore are gitignored), the body itemizes all four, and it cites run 2026.266.1801 (durations 13.622s/12.227s), not 1747.
5800494116 (head 1e57b24) — both findings stale-superseded: the box now ships a plan: (commit dd10336) with two deterministic checks, and the current body pastes the full 14-step table.
5800559833 (head dd10336) — stale-superseded: the current body's pasted output shows all 14 steps with N/14 numbering, so the "11 lines vs steps=14" contradiction no longer reproduces.

Verdict: PASS

ollama-cloud/deepseek-v4.1-flash — action-review.

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atrawog added 6 commits September 23, 2026 19:05

docs(layer-nerdctl): add the harness skill (family: distros)

bd0f239

Phase 6: the candy's skill node so the marketplace generator emits distros/skills/layer-nerdctl/SKILL.md.

docs: re-freeze the PR body against the final head

947ba10

docs: re-freeze the PR body against the final head

6ac4626

atrawog added 2 commits September 23, 2026 20:17

chore: don't ship the .check run artifacts or generated ignore files

6f745a6

The R10 run artifacts (.check/**) embed absolute home paths and are not source; gitignore them. Same for the generated .containerignore/.dockerignore.

docs: re-freeze the PR body against the final head

1e57b24

atrawog added 2 commits September 23, 2026 20:26

feat(bed): the bed box declares its own ADE plan (deterministic checks)

dd10336

Every new candy/image must ship a description + a plan with >=1 check; the check-nerdctl-app box now asserts nerdctl is installed by the composed candy and the nerdctl.toml is present.

docs: re-freeze the PR body against the final head

bf91cf8

aitrawog merged commit cf6e031 into main Sep 23, 2026
1 check passed

aitrawog deleted the feat/nested-pod-posture-v2 branch September 25, 2026 19:33

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feat(layer-nerdctl): nested-pod posture + its R10 bed (Phase 4, v2) - #2

feat(layer-nerdctl): nested-pod posture + its R10 bed (Phase 4, v2)#2
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aitrawog commented Sep 23, 2026 •

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