Engineering

Built for
the record.

How Stonewall stores sources, searches the record, cites evidence and deploys changes.

On this page
  1. 1Sources and access. Repository files feed private search and a separate public snapshot.
  2. 2Check the source. Citations identify the artifact and source path, with a line range where required.
  3. 3Pattern overlap. Compare ten demonstration labels using Jaccard similarity.
  4. 4Three checks, one queue. Three required checks and a squash-only merge queue guard every change to main.
  5. 5Six services, one plane. Cloud Run services deploy independently, with image scans, readiness checks and rollback.
  6. 6Production checks. Reliability, security, performance, operations and cost controls.

Sources and access. Private search and public snapshots share a source catalog.

Architecture: one canon, two lanesSources and signed ingest callbacks become verbatim sidecars, then rows in one manifest beside the codices. From that canon a public lane builds an aggregate snapshot served by stonewall-public and stonewall-portal, and a private lane syncs the full record into Neon Postgres on merge for the cockpit, the Telegram bot, and the chat agent. An export guard between the lanes fails the build closed.buildsync on mergeINSourcesdocuments, email,transcripts,screenshotsCALLBACKSIngest webhookINTAKESidecars300 dpi OCR floor,500 dpi vision goldCANONManifest + codicescatalog/manifest.mdPUBLIC LANEAggregate snapshotcounts, neutral labelsPRIVATE LANENeon Postgresfull text, pgvector,memoryEXPORT GUARD · THE BUILD FAILS CLOSEDstonewall-publicstonewall-portalstonewall-cockpitstonewall-botchat-agent-service-c2e9Architecture: one canon, two lanesSources and signed ingest callbacks become verbatim sidecars, then rows in one manifest beside the codices. From that canon a public lane builds an aggregate snapshot served by stonewall-public and stonewall-portal, and a private lane syncs the full record into Neon Postgres on merge for the cockpit, the Telegram bot, and the chat agent. An export guard between the lanes fails the build closed.buildsync onmergeINSourcesdocuments, transcripts,email, screenshotsINGESTWebhooksignedcallbacksINTAKESidecars300 dpi OCR floor, 500 dpi vision goldCANONManifest + codicescatalog/manifest.mdPUBLIC LANESnapshotcounts, neutrallabels onlyPRIVATE LANENeon Postgresfull text,pgvector,memoryEXPORT GUARD · FAILS CLOSEDstonewall-publicstonewall-portalstonewall-cockpitstonewall-botchat-agent-service-c2e9
FIG 1 The public export guard checks the snapshot before the build can proceed.

A Markdown manifest indexes artifacts by ID, type, date, person and pattern. Reference files record identity and chronology. Merge checks validate required indexes; corpus cross-reference freshness is advisory.

This site and the public API serve aggregate counts and demonstration labels. A build check rejects data outside the public export contract.

Neon Postgres holds the private corpus projection for full-text and semantic search. It also stores Shelby’s conversation memory for the cockpit and Telegram.

Storage and access
Corpus projection
Searchable source bodies, artifact metadata and the pattern taxonomy.
Semantic layer
Text chunks with 1536-dimension embeddings and an HNSW cosine index.
Memory
Threads, messages and operator memory shared by the cockpit and Telegram.
Access
Row-level security, default-deny for generic roles, a read-only query role, and an idempotent, schema-versioned migrator.

PostgreSQL 17 · pgvector · HNSW cosine · numbered migrations

Check the source. Citations connect an answer to the evidence behind it.

The citation spineEach factual claim in an answer is bound to the manifest artifact ID and the repo-relative source path, with a line range where the claim requires one.ANSWER“The record shows the expertconceded the point on cross.”A0071artifact IDsources/…/*.pdf.mdsource pathL23line range,where required
FIG 2 The citation format includes a source path, artifact ID where available and a line range where required.

Shelby retrieves source passages for research and deposition preparation. Citation links identify the artifact and repository path, with a line range where required, so the reader can check the passage.

The cockpit and Telegram use the same Claude model configuration and Postgres memory. See a fictional deposition example.

Source transcription

A sidecar is a text transcription stored beside its source. The two processing tiers are:

Searchable floor
OCR text for search.
  1. render at 300 dpi or more
  2. full-page raster OCR
  3. searchable sidecar
Gold
Visual transcription of text, reply chains and reactions.
  1. render at 500 dpi or more
  2. vision pass
  3. machine reaffirmation
  4. gold sidecar
Fictional sidecar. Quoted replies stay nested; images and reactions appear in brackets.
Speaker B @ 09:16
> [quoted: Speaker A @ 09:14]
> Can you send the exhibit list before the call?
Sent. Two attachments below.
[IMAGE: exhibit list, page 1 of 3, four-column table]
[reaction: thumbs up · Speaker A]

Pattern overlap. Jaccard similarity divides shared artifacts by the combined distinct artifacts for each pair of the ten demo labels.

Drawing the Jaccard matrix…

Strongest pairs

  1. Motion Posture Witness SequencingJaccard 0.27
  2. Calendar Control Billing HygieneJaccard 0.23
  3. Witness Sequencing Billing HygieneJaccard 0.23
  4. Exhibit Chain Service of ProcessJaccard 0.17
  5. Calendar Control Deadline CadenceJaccard 0.16
FIG 3 Ten demonstration labels; 22 of the 45 possible pairs shown across 939 indexed artifacts, from the public aggregate snapshot. Strongest: Motion Posture and Witness Sequencing, sharing 26 artifacts (J = 0.27). Labels are illustrative. Cell intensity shows overlap; the strongest pair is outlined.

Three checks, one queue. Every change clears three required checks, then a squash-only queue.

The merge contractA pull request must pass verify, protected code/config scan, CodeQL gate. It then lands through the merge queue (squash, one at a time) onto main, where a path-scoped Cloud Build trigger starts the service's deploy lane.CHANGEPull requestverifyprotected code/config scanCodeQL gateMERGE QUEUESquash, one at a timeall green, built on mainBRANCHmainCLOUD BUILDTriggerpath-scoped,one per serviceThe merge contractA pull request must pass verify, protected code/config scan, CodeQL gate, then lands through the merge queue onto main, where a path-scoped Cloud Build trigger starts the service's deploy lane.CHANGEPull requestRULESETThree required checksMERGE QUEUESquash, one at a timeall green, built on mainBRANCHmainCLOUD BUILDTriggerpath-scoped, one per service
FIG 4 The queue tests changes with main before merging. Each service then deploys through its own build trigger.
The three required checks
verify
Lint, type checks, builds, tests and bundle budgets, plus corpus consistency, required index freshness, asset hashes, identity and rendering audits. Corpus cross-reference freshness is advisory in ordinary verification.
protected code/config scan
Secret scanning on code and configuration, on every pull request and every queue entry. An advisory scan runs over the corpus beside it.
CodeQL gate
Three analyzers: GitHub Actions, JavaScript and TypeScript, Python. The gate passes only when all three finish.
Deployment checks

Services follow eight deployment stages. The table lists the conditions that stop a release or trigger rollback.

  1. Build the image, then a filesystem gate
  2. Scan Trivy, fixable high and critical findingsi
  3. Guard the main tip is unchangedii
  4. Lease one build per serviceiii
  5. Candidate tagged, at zero traffic
  6. Probe the exact commit, readyiv
  7. Promote full traffic, production probesv
  8. Finalize rollback held, lease released
MarkConditionCaught byResult
iA fixable high- or critical-severity finding in the imageTrivy, before pushThe build stops; nothing is published.
iiMain advanced with changes to this serviceThe main-tip guardThe build stops before publishing; the newer build deploys.
iiiAnother build holds the serviceThe deploy leaseThis build waits for the owner to finish.
ivThe candidate serves the wrong commit or fails readinessThe candidate probeTraffic never moves; production is untouched.
vA production probe fails after promotionPromote and finalizeThe prior revision is restored.
—Derived artifacts sit behind their sourcesverify, on the pull request and in the queueRefused until they are regenerated and committed.

Six services, one plane. Cloud Run, one region: one service and one build trigger per workload.

stonewall-publicPublic lane
stnwl.ai — this sitePublic lane
stonewall-cockpitPrivate lane
app.stnwl.ai — the operator cockpit and ShelbyPrivate lane
stonewall-portalPublic lane
api.stnwl.ai — the corpus APIPublic lane
stonewall-botPrivate lane
Shelby on TelegramPrivate lane
knowledge-base-webhookCallbacks
Signed ingest callbacksCallbacks
chat-agent-service-c2e9Private lane
The operator’s Google Chat agent, bounded toolsPrivate lane
stonewall-commandPrivate lane · Cloudflare Workers
The operator’s command agent, behind Cloudflare AccessPrivate lane · Cloudflare Workers
Triggers, edge and uptime

The service list comes from the deployment manifest. One more surface runs beside the fleet on Cloudflare Workers, deployed by hand. The apex sits behind a global external HTTPS load balancer with managed certificates. The stnwl.ai DNS zone uses Google Cloud DNS; stonewall.esq retains Cloudflare DNS-only nameservers. Eleven uptime checks run at a five-minute cadence, with alert policies for uptime-check failures.

ServiceDeploy configTrigger
stonewall-publiccloudbuild.public.yamlstonewall-public-main-push
stonewall-cockpitweb/cloudbuild.cockpit.yamlstonewall-cockpit-main-push
stonewall-portalcloudbuild.yamlstonewall-main-push
stonewall-botscripts/stonewall_bot/cloudbuild.bot.yamlstonewall-bot-main-push
knowledge-base-webhookcloudbuild.webhook.yamlstonewall-kb-webhook-main-push
chat-agent-service-c2e9apps/chat-agent/cloudbuild.chat-agent.yamlstonewall-chat-agent-main-push
stonewall-commandapps/stonewall-command/wrangler.jsoncwrangler deploy, operator-run
The full stack
Languages
Python 3.12 / 3.13 / 3.14, by service · TypeScript · Node 24 · Markdown
Canon
catalog/manifest.md · Markdown + JSON · stdlib stonewall.py CLI
Data plane
Neon Postgres 17 · pgvector, HNSW · Row-level security
Embeddings
Gemini embedding, the embedding model · gemini-embedding-001, 1536 dimensions
Public site
Next.js 16 standalone · Distroless Node 24 · Self-hosted Geist + Newsreader · GA4, deferred
Corpus API
FastAPI · Uvicorn · Repo JSON + in-memory search index
Cockpit
Next.js 16 · React 19 · Tailwind · Clerk · AI SDK
Shelby
Anthropic Claude · Claude Fable 5.1, the deploy-lane pin · A smaller Claude tier for distillation
Voice and audio
Whisper · Gemini 2.5 Pro, listening · TTS-1-HD
Chat agent
Gemini 2.5 Flash on Vertex AI · Bounded tools, read-only SQL
Intake
pypdfium2 · Tesseract · extract-msg · Two-pass vision
CI
GitHub Actions · pytest · Vitest · Playwright · CodeQL · gitleaks · Trivy
Infrastructure
Cloud Run · Cloud Build · Artifact Registry · Cloud DNS · HTTPS load balancer · Terraform · Cloud Monitoring

Production checks. Controls and their implementation.

Reliability
Readiness checks, rollback, hashed assets and live probes.
Security
Secret and image scanning, CodeQL, an export guard, default-deny data.
Performance
Performance checks, route bundle budgets and self-hosted fonts.
Operations
One service per workload; triggers and merge rules as code.
Cost
Scope-aware CI, frozen lockfiles, duplicate runs cancelled.
Files and gates

Reliability

  • Zero-traffic candidate, rollback heldscripts/cloud_run_safe_promote.pyCloud Build probes, every lane
  • Content-hashed assetsscripts/asset_version_stamp.pyverify
  • Declared surfaces, probed livecatalog/intake/state/surfaces.tomlaudit_surface_state.py
  • Cockpit reads with the API coldweb/lib/api.tsbundled snapshot fallback

Security

  • Secret scanning.github/workflows/gitleaks.ymlprotected code/config scan
  • Static analysis.github/workflows/codeql.ymlCodeQL gate
  • Public export guardscripts/assert_public_portal_payload.pyfails the build
  • Operator boundaryweb/middleware.tsallowlist, fails closed
  • Default-deny data accessweb/migrations/postgres/0028-data-api-default-deny.sqlrow-level security
  • Security headers, pinned actionsnext.config.jsactionlint and zizmor in verify

Performance

  • Performance invariantsscripts/check_web_perf_invariants.pyverify
  • Per-route bundle budgetsweb/perf-budgets.jsonpnpm check:bundles
  • Self-hosted fonts, deferred analyticstests/test_public_perf_invariants.pyverify

Operations

  • Triggers declared in codeterraform/edge.tftrigger roster audit, live
  • Merge rules as codedocs/ruleset-policy.jsonapply_ruleset_policy.py
  • Gates tested on a clean treescripts/audit_gate_lane_parity.py--check and --canary

Cost

  • Corpus-only verify for prosescripts/detect_pr_change_scope.pyverify scope
  • Frozen lockfilesDockerfile.publicpnpm install --frozen-lockfile
  • Duplicate runs cancelled.github/workflows/cancel-runs-on-janitor-close.ymljanitor
  • Warm capacity per servicedocs/deployment-current-state.mdpublic 2 · portal, cockpit, bot 1 · webhook, chat agent 0

Explore Stonewall. Browse the public snapshot or try the citation example.