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DongHyeonkaandClaude Opus 5 b2963105a8 docs(keycloak-session-store): import the session-storage lab as a new project 
The keycloak project ended with four open questions that design could not
settle. A two-VM lab was built to answer them by measurement, and this is
that material: 26 experiments, 125 raw command outputs, 22 browser captures.

Follows the import procedure in README.md.

  source/     the originating repository verbatim — 78 documents, 28 SVGs,
              8 manifests, plus .source-revision recording the commit
  final/      the SSOT
    document.md   729 lines written from the 29 experiment documents, not
                  concatenated: what was predicted, what was measured, and
                  where the measurement itself was wrong
    evidence/raw    125 outputs, flattened to <experiment>__<file> because
                    the originals collided (01-baseline.txt appeared three
                    times) and the audit only globs the top level
    evidence/meta   one per raw file; command and exitCode are null and the
                    README says why rather than inventing them
    evidence/browser  22 captures
    assets/       three diagrams through techviz
    .techviz/     their VizSpecs

A separate project rather than an addition to keycloak: the B-layer answers
that project's four questions, but the A, C and D layers are about cluster
failure, SSO and operations, and one document.md should hold one subject.
The four question records there can point here through 관계.

Recorded rather than papered over: only three of the 28 diagrams were
remade. The repository forbids hand-drawn SVG and forbids titles inside the
canvas; all 28 originals carry both, so converting them is redrawing, not
reformatting. They stay in source/ and the gap is written into the document.

verify-pipeline.py passes. audit-records.py reports no issues.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-04 22:51:59 +09:00

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<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="722" viewBox="0 0 1200 722" role="img">
<title>terminal evidence</title>
<desc>Terminal-style rendering generated from retained command output. Sensitive-looking values are redacted in the visual asset.</desc>
<rect x="1" y="1" width="1198" height="720" rx="14" fill="#0d1117" stroke="#30363d"/>
<rect x="1" y="1" width="1198" height="44" rx="14" fill="#161b22"/>
<rect x="1" y="30" width="1198" height="14" fill="#161b22"/>
<circle cx="24" cy="22" r="6" fill="#ff5f57"/>
<circle cx="44" cy="22" r="6" fill="#febc2e"/>
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<text x="92" y="27" fill="#8b949e" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace">terminal evidence</text>
<text x="24" y="68" fill="#c9d1d9" font-size="15" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">$ sed -n &#x27;467,481p&#x27; analysis/messaging/messaging-kafka-share-experimental.md</tspan></text>
<text x="24" y="90" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">cwd: /shared/document-detail/clean-architecture-backend-template</tspan></text>
<text x="24" y="112" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">time: 2026-09-01T05:42:34+00:00 · exit 0</tspan></text>
<line x1="24" y1="126" x2="1176" y2="126" stroke="#30363d"/>
<text x="24" y="166" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">### P2 — &quot;등록&quot;이 아무것도 등록하지 않고 성공을 반환한다</tspan></text>
<text x="24" y="188" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="210" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **사실.** `KafkaShareGroupRegistrar.register(profile, spec)`이 `spec`을 `Objects.requireNonNull`로만 처리하고 버린다. `ShareRe</tspan><tspan x="24" dy="22">gistration`은 `profile`과 `AtomicBoolean` 둘만 갖는다. Kafka 소비자가 만들어지지 않고(`import org.apache.kafka` 0건), `spec.sink</tspan><tspan x="24" dy="22">`가 저장되지 않으므로 어떤 전달도 일어나지 않는다. 반환된 registration은 `isActive() == true`를 보고한다.</tspan></text>
<text x="24" y="276" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **근거.** `evidence/raw/290` §D·§E.</tspan></text>
<text x="24" y="298" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **왜 문제인가.** 같은 클래스의 javadoc이 pause를 조용히 무시하는 것을 거절한 이유로 &quot;would let a retry policy that depends on </tspan><tspan x="24" dy="22">pausing appear to work while doing nothing&quot;을 든다. `register` 자체가 정확히 그 형태다 — 성공을 반환하고 아무것도 하지 않으며 `</tspan><tspan x="24" dy="22">isActive()`가 true다. 오늘 호출자가 없으므로 사고는 아니지만, 이 leaf를 배선하는 사람이 가장 먼저 부를 메서드다.</tspan></text>
<text x="24" y="364" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **확인 방법.** `evidence/raw/290` §E 재실행.</tspan></text>
<text x="24" y="386" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **후보.** (a) 실제 share group 소비자를 만든다. (b) 미구현임을 명시하고 `MessagingCapabilityUnavailableException`으로 거절한다</tspan><tspan x="24" dy="22"> — 이 leaf 자신의 원칙과 일관된다. (c) `register`를 제거하고 validator와 capability만 남긴다.</tspan></text>
<text x="24" y="430" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **다음 단계.** **CASE 후보.** &quot;무시보다 거절&quot;을 명시한 클래스가 자기 주 메서드에서는 무시한다는 형태가 그 자체로 가치가 있다.</tspan></text>
<text x="24" y="452" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="474" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">### P3 — 선언된 의존 셋이 사용되지 않는다</tspan></text>
<text x="24" y="496" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="518" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **사실.** `build.gradle`이 `org.apache.kafka:kafka-clients`를 선언하고 `import org.apache.kafka`가 0건. registry가 `messaging-</tspan><tspan x="24" dy="22">policy`·`messaging-kafka` 의존을 허용하고 두 패키지의 import가 0건.</tspan></text>
<text x="24" y="562" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **근거.** `evidence/raw/290` §D. import 전수.</tspan></text>
<text x="24" y="584" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **왜 문제인가.** `verifyCleanArchitectureDependencies`는 `allowed_dependencies`를 **상한**으로 검사하므로 미사용 의존을 잡지 </tspan><tspan x="24" dy="22">못한다. 결과: 이 leaf의 build closure가 실제 필요보다 넓고, `messaging-kafka`(34파일)와 그 전이 의존이 딸려 온다. 그리고 의존 선</tspan><tspan x="24" dy="22">언이 &quot;이 leaf가 Kafka를 쓴다&quot;는 인상을 준다.</tspan></text>
<text x="24" y="650" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">- **확인 방법.** `grep -rn &#x27;import org.apache.kafka\|import dev.caskeleton.messaging.policy\|import dev.caskeleton.messaging.kaf</tspan><tspan x="24" dy="22">ka\.&#x27; src/messaging/messaging-kafka-share-experimental/src`</tspan></text>
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