TN-003 — Define Diagnostic Service Repository Implementation and Validation Contract¶

Field	Value
Status	Completed
Activity Type	Discovery and Assessment
Record Type	Live
Project	Tomcat Monitoring
Phase	Diagnostic MVP Pilot
Activity Date	2026-08-31
Recorded Date	2026-08-31
Owner	Project owner
Working Mode	Write — documentation only
Authorization Status	Approved
Approved By	Project owner
Approval Date	2026-08-31

🎯 Objective¶

Menetapkan rencana implementasi, batas kepemilikan komponen, dan antarmuka validasi terstandar untuk repositori tomcat-diagnostic-service.

Target Utama & Kriteria Keberhasilan:

Repository Contract: Menetapkan batas tanggung jawab repositori aplikasi, lifecycle image, dan isolasi SQLite.
Validation Interface: Mendefinisikan spesifikasi skrip validate.sh dan baseline unit test.
Boundary: Rencana implementasi dan kontrak teknis; belum melakukan instalasi dependensi atau pembuatan source code.

🌍 Background¶

TN-001 menerima arsitektur Diagnostic MVP dan menetapkan repository tomcat-diagnostic-service sebagai pemilik source aplikasi, dependency lock, image lifecycle, migration, dan component test. TN-002 menyelesaikan konsolidasi keputusan tersebut ke current-state documentation. Repository lokal dan remote sekarang tersedia, tetapi branch main belum memiliki commit, source, governance, validation interface, atau image.

GAP-001 mewajibkan approved repository plan, source contract, dan validation interface sebelum service implementation. Approval sesi ini hanya mencakup documentation dan planning; ia tidak mengizinkan source, dependency, build, runtime, commit, atau push.

📚 Scope¶

Aktivitas mencakup bounded discovery terhadap contract Diagnostic MVP, repository kosong, dan reusable Node.js runtime; assessment alternatif toolchain; recommendation repository layout, dependency boundary, validation layers, implementation sequence, serta readiness gate.

Aktivitas tidak mencakup perubahan pada tomcat-diagnostic-service, pembuatan source atau scaffold, pemasangan dependency, image build, container, network, volume, database, collector, monitoring configuration, runtime test, cleanup, commit, atau push.

📥 Inputs¶

Diagnostic MVP hanya menerima TomcatDown; automatic remediation, Integration Bridge, dan TrueSight tidak aktif.
Webhook harus melakukan authentication, validation, normalization, dan durable SQLite commit sebelum mengembalikan 202.
Service menggunakan satu worker, queue maksimum 50, timeout 60 detik, dan bounded evidence dengan target identity yang berasal dari local allowlist.
SQLite menggunakan WAL, automatic forward migration, satu logical writer, target 100 MiB, dan hard boundary 250 MiB.
Prometheus query menggunakan total timeout lima detik, satu attempt tanpa retry dalam satu diagnostic run, lalu processing berlanjut dengan evidence source lain dan menandai metrics sebagai unavailable.
Plain-text dan HTML email menggunakan tujuh bagian berurutan dari alert summary sampai rule serta diagnostic traceability.
Repository aplikasi memiliki source, dependency lock, image lifecycle, migrations, dan component tests. Integration configuration dan end-to-end verification tetap dimiliki repository tomcat-monitoring.

🔍 Findings¶

Repository readiness¶

tomcat-diagnostic-service tersedia pada branch main, tetapi tidak memiliki commit maupun file. Remote tracking yang tercetak sebagai origin/main [gone] konsisten dengan remote repository yang belum memiliki initial commit.
Repository kosong belum memiliki AGENTS.md; governance harus dibuat sebagai artifact pertama sebelum source aplikasi.
tomcat-monitoring, devops-handbook, dan reusable nodejs runtime berada pada worktree bersih. Tidak ada perubahan pengguna yang beririsan.

Contract pressure on the implementation¶

Implementation harus memisahkan webhook acceptance transaction dari asynchronous diagnostic work, tetapi tetap memakai satu logical writer. Ia memerlukan validation terhadap untrusted JSON, deterministic rule fixtures, versioned schema dan migrations, HTTPS, bearer authentication, SMTP rendering, bounded filesystem reads, health endpoints, serta metrics tanpa sensitive labels.

Source layout harus membuat boundary tersebut dapat diuji secara terpisah. HTTP handler tidak boleh langsung memiliki path, query, SQLite, renderer, atau SMTP detail; adapter memperoleh target hanya dari validated local configuration.

Review project owner menerima total Prometheus timeout lima detik dengan satu attempt tanpa retry pada satu diagnostic run. Timeout tidak membatalkan diagnosis; log, crash artifact, application health, dan collector spool tetap diproses, sementara canonical result mencatat Prometheus sebagai timeout.

Review yang sama menerima struktur email tujuh bagian: Alert Summary, Diagnostic Assessment, Key Metrics Snapshot, Correlated Log Evidence, Unavailable or Contradicting Evidence, Recommended Operator Actions, serta Rule and Diagnostic Traceability. Log section menggunakan correlated sanitized excerpt, bukan arbitrary latest-log tail. RCA wording hanya digunakan jika classification mengizinkan klaim tersebut.

Reusable Node.js runtime¶

Repository nodejs menyediakan pinned local base image localhost/nodejs:24.18.0, working directory /app, non-root user, npm, dan signal-forwarding entrypoint. Ia sengaja tidak menyediakan framework, application dependency, port, health check, atau default command sehingga seluruh application contract tetap dimiliki Diagnostic Service.

Node.js 24.18.0 menyediakan stable built-in test runner dan built-in HTTPS. Built-in node:sqlite tersedia tanpa experimental flag, tetapi upstream masih memberinya stability 1.2 atau release candidate. Status tersebut merupakan risiko compatibility yang harus diterima secara eksplisit jika dipakai untuk durable pilot state.

🔀 Alternatives¶

Alternative	State	Assessment
Node.js 24 ESM JavaScript, native HTTPS/test, dan built-in `node:sqlite`	Selected and accepted	Selaras dengan reusable runtime lokal dan meminimalkan native application dependency; risiko release-candidate `node:sqlite` diterima dengan exact pin, adapter isolation, dan mandatory tests
Node.js 24 dengan third-party SQLite binding	Assessed	SQLite binding lebih matang, tetapi menambah native dependency, Alpine build toolchain, supply-chain surface, dan image complexity
Python dengan standard-library SQLite	Assessed	SQLite matang dan implementation langsung, tetapi belum ada reusable runtime contract lokal dan menambah runtime ownership serta lifecycle baru
Go dengan SQLite driver	Assessed	Binary dan resource control kuat, tetapi migration, SMTP, schema validation, serta SQLite driver menambah toolchain baru tanpa reusable repository contract

TypeScript tidak direkomendasikan untuk baseline pertama. Ia menambahkan compile stage dan generated artifact sebelum contract behavior terbukti. Versioned JSON schema, runtime validation, JSDoc, module boundary, dan fixture tests tetap diwajibkan agar plain ESM JavaScript tidak mengurangi validation coverage.

⚠️ Risks¶

Risk	State	Treatment
`node:sqlite` berubah selama Node.js 24 lifecycle	Open	Pin exact base runtime; bungkus SQLite pada satu adapter; tambahkan migration, restart, WAL, deduplication, dan capacity contract tests
Synchronous SQLite API menahan event loop	Mitigated by design	Satu worker dan satu logical writer sesuai accepted contract; batasi transaction dan larang evidence collection atau SMTP di dalam transaction
Minimal-dependency approach menghasilkan handwritten validation yang rapuh	Open	Gunakan versioned JSON Schema dan pilih satu validator dependency yang exact-pinned pada implementation gate
Satu TN implementasi menjadi terlalu luas	Mitigated by plan	Pecah delivery berdasarkan independently verifiable repository, persistence, ingestion, diagnosis, dan delivery boundaries
Runtime build mengonsumsi mutable local tag	Open	Application `Containerfile` harus menggunakan exact approved base identity; digest atau publication identity ditetapkan sebelum build authorization
Prometheus lambat menghabiskan global diagnostic budget	Mitigated by accepted contract	Gunakan total timeout lima detik dan satu attempt; lanjutkan source lain serta render unavailable marker
Email menyatakan RCA lebih kuat daripada evidence	Mitigated by accepted contract	Renderer mengikuti classification/confidence dan menampilkan limitation serta contradicting/unavailable evidence

🧭 Recommendation¶

Gunakan Node.js 24.18.0 LTS dengan ESM JavaScript dan image turunan dari reusable Node.js runtime. Gunakan built-in HTTPS dan node:test; gunakan node:sqlite hanya setelah project owner menerima risiko release-candidate. Pilih satu JSON Schema validator dan satu SMTP client sebagai application dependencies yang exact-pinned melalui package-lock.json; jangan menambahkan web framework, ORM, queue broker, template engine, atau general-purpose host control dependency pada baseline.

Repository source contract¶

tomcat-diagnostic-service/
├── AGENTS.md
├── README.md
├── PROJECT
├── VERSION
├── CONFIG
├── Containerfile
├── package.json
├── package-lock.json
├── config/
│   └── schemas/
├── migrations/
├── src/
│   ├── adapters/
│   ├── application/
│   ├── domain/
│   └── server/
├── test/
│   ├── fixtures/
│   ├── integration/
│   └── unit/
└── scripts/
    ├── build.sh
    ├── clean.sh
    ├── run.sh
    ├── test.sh
    └── validate.sh

domain memiliki normalized evidence, rule, canonical result, dan lifecycle semantics tanpa network atau filesystem access. application mengorkestrasi use case dan queue. adapters memiliki SQLite, Prometheus, bounded file/spool, dan SMTP implementation. server memiliki HTTPS, authentication, request limit, schema validation, health, readiness, dan metrics interfaces.

Validation interface¶

Interface	Boundary	Expected result
`./scripts/validate.sh`	Required files, metadata consistency, shell syntax, package lock, schema fixtures, forbidden dependency/import patterns, dan secret scan terbatas	Source contract valid tanpa network atau runtime container
`npm test`	Unit serta local integration tests dengan temporary SQLite dan fixtures	Determinism, validation, migration, idempotency, isolation, bounds, five-second Prometheus fallback, ordered renderer, dan disabled-integration behavior lulus
`./scripts/build.sh`	Application image derived from exact approved Node.js base	Versioned local image terbangun sebagai non-root artifact
`./scripts/test.sh`	Disposable component test	Startup, liveness/readiness, HTTPS/auth, commit-before-`202`, restart persistence, metrics, resource boundary, dan exact cleanup terbukti

validate.sh dan npm test menjadi interface minimum sebelum CI/CD. Build dan component test tidak termasuk authorization TN ini maupun implementation TN pertama.

Implementation sequence¶

Decision Gate: toolchain and node:sqlite risk
            |
            v
Repository governance and static validation baseline
            |
            v
Schema, migrations, durable ingestion, and queue
            |
            v
Target isolation, evidence adapters, and TomcatDown engine
            |
            v
Canonical result, Mailpit renderer, health, and metrics
            |
            v
Image build and disposable component verification
            |
            v
tomcat-monitoring integration and end-to-end verification

Setiap tahap setelah Decision Gate memerlukan Technical Note dan authorization yang sesuai. Collector, physical TLS/token lifecycle, production deployment, dan end-to-end failure injection tetap berada di luar repository bootstrap.

❓ Open Questions¶

Question	State	Owner	Closure condition	Blocked activity
Apakah Node.js `24.18.0` ESM JavaScript diterima sebagai service toolchain?	Answered — accepted 2026-08-31	Project owner	Closed by explicit acceptance and TM-ADR-0013	Tidak lagi memblokir planning source implementation
Apakah risiko release-candidate `node:sqlite` diterima untuk pilot dengan exact runtime pin dan adapter isolation?	Answered — accepted 2026-08-31	Project owner	Closed by explicit risk acceptance and TM-ADR-0013	Tidak lagi memblokir persistence design
JSON Schema validator dan SMTP client mana yang dipin?	Deferred	Service owner / engineer	Upstream version/security review pada implementation TN yang pertama memerlukannya	Schema validator dan notification implementation; tidak memblokir governance baseline
Apa immutable identity reusable Node.js base?	Open	Runtime owner / engineer	Approved version plus digest atau published artifact identity	Image build; tidak memblokir source baseline

⚖️ Decision Handoff¶

Project owner menerima dua recommendation yang saling terkait pada 2026-08-31:

Node.js 24.18.0 dengan plain ESM JavaScript, built-in HTTPS/test, tanpa web framework atau ORM; dan
built-in node:sqlite untuk pilot dengan exact runtime pin, isolated adapter, serta mandatory migration/restart/WAL/capacity tests.

Decision Gate selesai. Acceptance menyelesaikan planning objective TN-003 dan mengizinkan penyusunan TN implementation berikutnya. Persetujuan tersebut belum mengizinkan perubahan source.

Timeout Prometheus lima detik dan struktur email tujuh bagian telah diterima project owner pada 2026-08-31. Keduanya tidak lagi menjadi bagian Decision Gate toolchain.

📚 Scope Changes¶

Element	Record
Reason	Review project owner sebelum commit menemukan bahwa timeout Prometheus dan urutan canonical email belum cukup eksplisit
Impact	Scope dokumentasi diperluas ke rule specification, notification contract, requirements traceability, dan record TN-003
Approved By	Project owner
Approval Date	2026-08-31
Boundary	Tidak mengizinkan source, dependency, build, runtime, commit, atau push

Project owner kemudian menerima Decision Gate Node.js dan node:sqlite serta memberikan authorization commit dokumentasi pada 2026-08-31. Authorization tersebut tidak memperluas scope ke source atau runtime.

💻 Commands Executed¶

Standards and repository discovery¶

git status --short --branch
sed -n '1,360p' docs/standards/documentation-standards.md
sed -n '1,520p' docs/standards/engineering-journal-standards.md
sed -n '521,1100p' docs/standards/engineering-journal-standards.md
sed -n '1,430p' docs/standards/writing-standards.md
wc -l docs/standards/documentation-standards.md docs/standards/engineering-journal-standards.md docs/standards/writing-standards.md
sed -n '1,240p' docs/standards/engineering-journal-standards.md
sed -n '241,480p' docs/standards/engineering-journal-standards.md
sed -n '481,720p' docs/standards/engineering-journal-standards.md
sed -n '721,940p' docs/standards/engineering-journal-standards.md
sed -n '941,1089p' docs/standards/engineering-journal-standards.md
sed -n '1,120p' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages
sed -n '1,180p' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md

Contract and alternative discovery¶

rg -n -i 'node\.js|nodejs|typescript|javascript|python|go|fastify|express|runtime|dependency|package|validator|validation interface' docs/projects/tomcat-monitoring/diagnostic-mvp docs/adr/tomcat-monitoring/adr-records/TM-ADR-0006.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0007.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0008.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0009.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0010.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0011.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0012.md
rg -n -i 'tomcat-diagnostic|diagnostic service|sqlite|fastify|express|typescript|node\.js|python|golang|webhook' /home/eddywiyatno/source/brainstorming /home/eddywiyatno/git/nodejs/README.md /home/eddywiyatno/git/nodejs/PROJECT /home/eddywiyatno/git/nodejs/VERSION /home/eddywiyatno/git/nodejs/CONFIG /home/eddywiyatno/git/nodejs/Containerfile /home/eddywiyatno/git/nodejs/entrypoint.sh
git -C /home/eddywiyatno/git/nodejs status --short --branch
sed -n '1,280p' /home/eddywiyatno/git/nodejs/AGENTS.md
sed -n '1,240p' /home/eddywiyatno/git/nodejs/README.md
sed -n '1,240p' /home/eddywiyatno/git/nodejs/PROJECT
sed -n '1,240p' /home/eddywiyatno/git/nodejs/VERSION
sed -n '1,240p' /home/eddywiyatno/git/nodejs/CONFIG
sed -n '1,240p' /home/eddywiyatno/git/nodejs/Containerfile
sed -n '1,240p' /home/eddywiyatno/git/nodejs/entrypoint.sh
rg --files /home/eddywiyatno/git/nodejs/scripts | sort | xargs -r -n1 sed -n '1,220p'
for f in tomcat-down-rule-specification.md alertmanager-webhook-contract.md target-and-evidence-contract.md restricted-event-collector-contract.md diagnostic-result-and-confidence-contract.md sqlite-lifecycle-contract.md notification-and-integration-contract.md non-functional-and-security-contract.md requirements-traceability.md; do echo "===== $f ====="; sed -n '1,360p' "docs/projects/tomcat-monitoring/diagnostic-mvp/$f"; done

Contract pages pada authoritative reading order dibaca menggunakan bounded sed -n. Official Node.js 24.18.0 SQLite dan test-runner documentation juga direview secara read-only; tidak ada dependency atau network artifact yang ditambahkan ke repository.

Documentation verification¶

git diff --check
python3 -c 'import pathlib,re,sys; files=[pathlib.Path(p) for p in sys.argv[1:]]; broken=[]
for f in files:
 text=f.read_text()
 for target in re.findall(r"(?<!!)\[[^]]+\]\(([^)]+)\)", text):
  target=target.strip("<>").split("#",1)[0]
  if not target or "://" in target or target.startswith("/") or target.startswith("mailto:"): continue
  resolved=(f.parent/target).resolve()
  if not resolved.exists(): broken.append((str(f),target))
print(f"files={len(files)} broken_links={len(broken)}")
for item in broken: print(f"{item[0]} -> {item[1]}")
sys.exit(1 if broken else 0)' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
rg -n '^#|\| Status \||Authorization Status|Decision Gate|GAP-001|source implementation' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
command -v mkdocs || true
git status --short --branch
git diff --stat
git diff -- docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
rg -n '^#{1,6} ' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
if rg -n '[[:blank:]]+$' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md; then exit 1; else echo 'trailing_whitespace=0'; fi

git status --short --branch
sed -n '1,130p' docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md
sed -n '1,120p' docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md
sed -n '1,130p' docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md
sed -n '1,380p' docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md

git diff --check
python3 -c 'import pathlib,re,sys; files=[pathlib.Path(p) for p in sys.argv[1:]]; broken=[]
for f in files:
 text=f.read_text()
 for target in re.findall(r"(?<!!)\[[^]]+\]\(([^)]+)\)", text):
  target=target.strip("<>").split("#",1)[0]
  if not target or "://" in target or target.startswith("/") or target.startswith("mailto:"): continue
  resolved=(f.parent/target).resolve()
  if not resolved.exists(): broken.append((str(f),target))
print(f"files={len(files)} broken_links={len(broken)}")
for item in broken: print(f"{item[0]} -> {item[1]}")
sys.exit(1 if broken else 0)' docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
rg -n -C 2 'five-second|five seconds|lima detik|without retry|without an in-run retry|seven ordered|tujuh bagian|Correlated Log Evidence|RULE-007|MSG-003' docs/projects/tomcat-monitoring/diagnostic-mvp docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
if rg -n '[[:blank:]]+$' docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md; then exit 1; else echo 'trailing_whitespace=0'; fi
git status --short --branch
git diff --stat

Decision closure and commit preparation¶

git status --short --branch
sed -n '1,260p' docs/adr/tomcat-monitoring/index.md
sed -n '1,160p' docs/adr/tomcat-monitoring/adr-records/.pages
sed -n '1,240p' docs/adr/tomcat-monitoring/adr-records/TM-ADR-0010.md
sed -n '1,240p' docs/adr/tomcat-monitoring/adr-records/TM-ADR-0012.md
sed -n '1,210p' docs/projects/tomcat-monitoring/development/index.md
sed -n '1,180p' docs/projects/tomcat-monitoring/diagnostic-mvp/gap-register.md
git diff --check
python3 -c 'import pathlib,re,sys; files=[pathlib.Path(p) for p in sys.argv[1:]]; broken=[]
for f in files:
 text=f.read_text()
 for target in re.findall(r"(?<!!)\[[^]]+\]\(([^)]+)\)", text):
  target=target.strip("<>").split("#",1)[0]
  if not target or "://" in target or target.startswith("/") or target.startswith("mailto:"): continue
  resolved=(f.parent/target).resolve()
  if not resolved.exists(): broken.append((str(f),target))
print(f"files={len(files)} broken_links={len(broken)}")
for item in broken: print(f"{item[0]} -> {item[1]}")
sys.exit(1 if broken else 0)' docs/adr/tomcat-monitoring/index.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0013.md docs/projects/tomcat-monitoring/diagnostic-mvp/index.md docs/projects/tomcat-monitoring/development/index.md docs/projects/tomcat-monitoring/diagnostic-mvp/gap-register.md docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
rg -n 'TM-ADR-0013|Status \| Completed|Answered — accepted|GAP-001.*Closed|Accepted design and implementation plan|Node.js `24.18.0`' docs/adr/tomcat-monitoring docs/projects/tomcat-monitoring
if rg -n '[[:blank:]]+$' docs/adr/tomcat-monitoring/index.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0013.md docs/projects/tomcat-monitoring/diagnostic-mvp/index.md docs/projects/tomcat-monitoring/development/index.md docs/projects/tomcat-monitoring/diagnostic-mvp/gap-register.md docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md; then exit 1; else echo 'trailing_whitespace=0'; fi
git status --short --branch
git diff --stat

🧭 Reproduction Reference¶

Section ini ditambahkan pada 2026-08-31. TN-003 menghasilkan implementation contract dan TM-ADR-0013, bukan source aplikasi. Exact published result berada pada handbook commit 2c0535e.

git show --stat 2c0535e
git show 2c0535e:docs/adr/tomcat-monitoring/adr-records/TM-ADR-0013.md
git show 2c0535e:docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md

Source implementation baru dimulai pada TN-004. Karena itu TN-003 tidak dapat digunakan sebagai build procedure dan tidak menyatakan sebaliknya.

✅ Verification¶

Method	Expected result	Actual result	Evidence
`git diff --check`	Tidak ada whitespace error	Passed	Command selesai tanpa output
Read-only local-link checker	Seluruh relative Markdown link pada changed Markdown scope memiliki target	Passed	`files=10 broken_links=0`
Metadata dan gate review	Status, authorization, open question, dan Decision Gate terlihat	Passed	Heading serta marker contract ditemukan oleh `rg`
Scope review	Diff hanya menyentuh approved journal, ADR, contract, dan current-state documentation	Passed	Sepuluh Markdown files dan satu `.pages` navigation file; repository source lain tetap bersih
MkDocs render	File dapat dirender melalui project toolchain	Not verified	`mkdocs` tidak tersedia pada `PATH`; dependency tidak dipasang

🧾 Outcome¶

Planning record telah dibuat dan repository, source, validation, serta urutan implementation telah menjadi accepted contract. Node.js 24.18.0 ESM dan risiko release-candidate node:sqlite diterima dengan exact pin, adapter isolation, serta mandatory persistence tests. Tidak ada source atau runtime state yang berubah.

Prometheus timeout/fallback dan canonical email ordering sekarang menjadi accepted implementation contract dengan requirement serta future evidence yang dapat ditelusuri. SQLite retention tidak diubah karena existing contract sudah menetapkan startup/hourly housekeeping, 30-day retention, WAL checkpoint, incremental vacuum, dan target/hard capacity behavior.

GAP-001 ditutup secara append-oriented melalui Gap Register dan TM-ADR-0013. GAP lain tetap mempertahankan owner serta closure condition existing. Exact immutable identity reusable Node.js base tetap diperlukan sebelum image build.

⏭️ Next Steps¶

Aktivitas berikutnya adalah TN-004 untuk membentuk repository governance dan static validation baseline saja. Source edit, dependency installation, image build, runtime, integration, dan push tetap memerlukan authorization terpisah sesuai scope masing-masing.

💻 Version-Control Handoff¶

Project owner memberikan authorization commit pada 2026-08-31 untuk seluruh documentation scope TN-003. Push tetap menjadi tindakan manual operator.

Stage attempt pertama gagal karena sandbox memasang Git metadata directory sebagai read-only sehingga .git/index.lock tidak dapat dibuat. Working tree dan index tidak berubah oleh kegagalan tersebut. Command git add yang sama kemudian dijalankan ulang melalui approved elevated Git permission dan berhasil; tidak ada file di luar exact list yang ditambahkan.

git add docs/adr/tomcat-monitoring/index.md docs/adr/tomcat-monitoring/adr-records/TM-ADR-0013.md docs/projects/tomcat-monitoring/development/index.md docs/projects/tomcat-monitoring/diagnostic-mvp/gap-register.md docs/projects/tomcat-monitoring/diagnostic-mvp/index.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/requirements-traceability.md docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/.pages docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/index.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
git add docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
git diff --cached --check
git diff --cached --stat
git diff --cached --name-status
git status --short --branch
git diff --cached -- docs/adr/tomcat-monitoring/adr-records/TM-ADR-0013.md docs/projects/tomcat-monitoring/diagnostic-mvp/tomcat-down-rule-specification.md docs/projects/tomcat-monitoring/diagnostic-mvp/notification-and-integration-contract.md docs/projects/tomcat-monitoring/diagnostic-mvp/gap-register.md docs/projects/tomcat-monitoring/engineering-journal/diagnostic-mvp-pilot/TN-003-define-diagnostic-service-repository-implementation-and-validation-contract.md
git commit -m "docs(tomcat-monitoring): define diagnostic service contract"

TN-003 — Define Diagnostic Service Repository Implementation and Validation Contract¶

🎯 Objective¶

🌍 Background¶

📚 Scope¶

📥 Inputs¶

🔍 Findings¶

Repository readiness¶

Contract pressure on the implementation¶

Operator refinement before commit¶

Reusable Node.js runtime¶

🔀 Alternatives¶

⚠️ Risks¶

🧭 Recommendation¶

Repository source contract¶

Validation interface¶

Implementation sequence¶

❓ Open Questions¶

⚖️ Decision Handoff¶

📚 Scope Changes¶

💻 Commands Executed¶

Standards and repository discovery¶

Contract and alternative discovery¶

Documentation verification¶

Operator refinement review¶

Operator refinement verification¶

Decision closure and commit preparation¶

🧭 Reproduction Reference¶

✅ Verification¶

🧾 Outcome¶

⏭️ Next Steps¶

💻 Version-Control Handoff¶

TN-003 — Define Diagnostic Service Repository Implementation and Validation Contract¶

🎯 Objective¶

🌍 Background¶

📚 Scope¶

📥 Inputs¶

🔍 Findings¶

Repository readiness¶

Contract pressure on the implementation¶

Operator refinement before commit¶

Reusable Node.js runtime¶

🔀 Alternatives¶

⚠️ Risks¶

🧭 Recommendation¶

Repository source contract¶

Validation interface¶

Implementation sequence¶

❓ Open Questions¶

⚖️ Decision Handoff¶

📚 Scope Changes¶

💻 Commands Executed¶

Standards and repository discovery¶

Contract and alternative discovery¶

Documentation verification¶

Operator refinement review¶

Operator refinement verification¶

Decision closure and commit preparation¶

🧭 Reproduction Reference¶

✅ Verification¶

🧾 Outcome¶

⏭️ Next Steps¶

💻 Version-Control Handoff¶

🔗 Related Documentation¶