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Diagnose Imagepullbackoff · bregman-arie | DecimalAI

devopsby bregman-arie

Diagnose Imagepullbackoff

bregman-arie/Diagnose ImagePullBackOff

Source bregman-arie/devops-sre-skills ↗License Apache-2.0

Determine why a pod cannot pull its container image and resolve safely.

SkillScore95Maintained

Automatic

DevOps & SRE pack

Last verified 8/3/2026

What it changes

Passed 21 of 22 test cases with the skill, and 18 of 22 without it.

Without skill82%

With skill95%

Checks it passed that the model alone missed

Escalates to the registry team or registry vendor.
Reads the event message to capture the exact pull error code or reason.
Identifies x509 decision branch for certificate chain, MITM, or proxy issues.

and 1 more in the full report

3 fixed18 passed either way1 still failing0 broke

Pass-rate lift: +14 pp
Tokens: -30%
Agent turns: 0%
Response time: -52%

Model gemini-3.6-flashMeasured 8/3/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/bregman-arie-diagnose-imagepullbackoff/SKILL.md https://app.decimal.ai/s/bregman-arie-diagnose-imagepullbackoff/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add bregman-arie-diagnose-imagepullbackoff, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/bregman-arie-diagnose-imagepullbackoff/ and pins it in .decimal/skills.lock

decimalai skills add bregman-arie-diagnose-imagepullbackoff

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/bregman-arie-diagnose-imagepullbackoff/SKILL.md https://app.decimal.ai/s/bregman-arie-diagnose-imagepullbackoff/SKILL.md

Raw file: /s/bregman-arie-diagnose-imagepullbackoff/SKILL.md ↗ · machine-readable summary at /s/bregman-arie-diagnose-imagepullbackoff.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

You have identified that container `web-frontend` in pod `web-789` is failing. What is the immediate second step in the diagnostic procedure?

What was checked, without and with the skill
Checked	Without skill	With skill
Reads the event message to capture the exact pull error code or reason.	Missed	Passed

case-17 · gemini-3.6-flash · 8/3/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md45 linessingle file

When to use

Use when a pod is stuck in ImagePullBackOff or ErrImagePull.

Preconditions

You have read access to the namespace.
You can identify the image reference from pod spec or describe output.

Procedure

Confirm the failing image and container.
Read the event message for the exact pull error (404/401/timeout/TLS).
Validate the image name/tag/digest exists (out-of-band via registry).
Validate image pull secrets and service account configuration.
Validate network egress/DNS/TLS to the registry.

Decision points

not found: wrong tag/digest or repo path.
unauthorized: missing/incorrect credentials or secret reference.
i/o timeout: network path, proxy, firewall, or registry outage.
x509: certificate chain/mitm/proxy issues.

Verification

New pods progress to Running without pull errors.
Events stop showing pull failures.

Rollback / undo

Revert image reference to the last known-good tag/digest.
Revert service account/secret references if changed.

Escalation

Registry team/vendor if the registry is down or auth is broken broadly.
Platform/network team for cluster-wide DNS/egress/TLS issues.

Examples

Track record

Benchmark

21 / 22

test cases passed, vs 18 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/1/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

bregman-arie / devops-sre-skills

skills/kubernetes/diagnose-imagepullbackoff/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/1/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.