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21 vignettes · May 2026 → June 2026 · agent sessions with the hosted AADM MCP

Patterns from the field.

Portfolio band

~509–775engineer-hours

Redirected from wrong fixes, duplicate UI, false CI, and meeting loops across these 20+1 patterns — not raw codegen speed.

These are real session patterns from teams running the AADM MCP. The app names are fictional. The bugs, refactors, and decisions are not. Hours are illustrative — the typical-wrong-path vs the attested-path, for a senior engineer + agent pair.

Every vignette below is the same move: a senior engineer's judgment applied before the agent starts editing rather than after. Agentic engineering is the general form of that move.

Fictional apps. Real patterns.

A

App names are fictional

StudioPublish, LedgerFlow, FleetDispatch — none of these are real customers. The bugs, refactors, and product calls behind each story are real; the brand has been anonymized.

B

Hours are illustrative

Ranges compare a typical wrong-path (meetings, false fixes, full CI, parallel UI) against the attested AADM path. A senior engineer + agent pair, not a guaranteed SLA.

C

AADM frames; your repo proves

AADM MCP frames problems, names seams, and enforces evidence obligations. Your repository's tests and CI still decide pass/fail. Nothing here is a compliance verdict.

The catalog. In one place.

Each card · the app (fictional), the industry, what the team would have done without governance, what AADM tools moved the conversation, and an illustrative hours-saved range. Read straight through, or skim for shapes that match your work.

  • 01

    Media

    StudioPublish

    12–18 hrs saved

    Two exits, not one Back

    Producers drilling into an export sub-page kept landing in the wrong parent — campaign, QC queue, or library — because a single Back control ignored where they came from. ux_surface_pass, user_flow, and pressure_test modeled two intentional exits (return to origin vs return to hub) and named component tests before any header tweak shipped.

    Tools the agent called

    ux_surface_pass user_flow pressure_test
  • 02

    Edtech

    Vertex Learning

    20–30 hrs saved

    Integration gap inventory

    Product committed to a full publish loop across slide, voice, video, and LMS vendors, but engineering only had partial async jobs and fourteen scattered tickets. ux_surface_pass captured the ten-step author journey; signal_stack_outline and journey_attest tagged what was proven vs latent on operator monitoring — producing one attested requirements brief instead of repeated cross-team workshops.

    Tools the agent called

    ux_surface_pass signal_stack_outline journey_attest
  • 03

    Retail

    Northstar Retail

    30–45 hrs saved

    Slice the 4k monolith

    One merchant-admin screen (~4k LOC) shared URL state and cross-deck cache invalidation across three in-page decks — a split-without-plan would have broken purge auth. route_lane and plan_delivery sequenced hook attribution first; fetch_auth pulled tenancy controls in; architecture_lens pressure-tested purge vs archive. Named slices shipped instead of delete-and-pray.

    Tools the agent called

    route_lane plan_delivery fetch_auth architecture_lens
  • 04

    Analytics

    Pulse Analytics

    16–24 hrs saved

    False-green dashboards

    Tenant lifecycle tests passed while finance disputed usage percentages — client DTOs fabricated fields and mocks used the wrong metric name (unattributed_pct vs unattributed_usage_pct). prism_frame split integrity vs measurement; sentinel_closure forced explicit pass/fail on schema seams — surfacing false-green dashboards separate from delete proofs.

    Tools the agent called

    prism_frame sentinel_closure
  • 05

    Fintech

    LedgerFlow

    24–40 hrs saved

    Billing cycle math

    Month-end API credits overshot finance expectations because the usage query treated cycle end as inclusive when the contract said exclusive — and one webhook path skipped balance checks. debug_defect and prism_frame kept the thread evidence-first; journey_attest mapped reconcile nodes. Ledger fixes landed without dashboard band-aids or “upgrade the database” detours.

    Tools the agent called

    debug_defect prism_frame sentinel_closure journey_attest
  • 06

    Insurance

    Harbor Insurance

    8–14 hrs saved

    CORS preflight trap

    Members saw empty account settings in production while Node integration tests passed — a custom client header was missing from the CORS allow-list. debug_defect chained DevTools proof → header setter → allow-list → contract test, halting timeout-padding guesses. Fix shipped in one attested path.

    Tools the agent called

    debug_defect
  • 07

    Construction

    BridgeWorks

    10–16 hrs saved

    Missing projection row

    A new work package appeared in the spine but handoff preview returned 500 — partial projection lists skipped cold-start materialization. On-call proposed doubling query timeouts. triage_bug ruled out infra; digfind targeted materialization policy. Scoped fix, no rollback.

    Tools the agent called

    triage_bug digfind
  • 08

    Regtech

    Atlas Compliance

    12–20 hrs saved

    Alert noise, not incident

    Monitoring fired 258 critical events in one day — all one self-healing backlog tick with duplicate worker emits and zero stale rows. Leadership wanted rollback. triage_bug and classify_bug downgraded to telemetry hygiene, not customer incident.

    Tools the agent called

    triage_bug classify_bug
  • 09

    Logistics

    FleetDispatch

    25–35 hrs saved

    Three IDs, silent FK failures

    Mid-migration, org slug, depot UUID, and middleware scope coexisted while export routes still wrote slug into UUID FK columns. prism_frame documented partial ship; fetch_seam (SEAM-06) named contract drift; map_feature listed four product blockers. Cutover continued with a decision log — not depotId ?? orgSlug spread.

    Tools the agent called

    prism_frame route_lane fetch_seam map_feature
  • 10

    Healthcare

    Meridian Health

    14–22 hrs saved

    CI cites ghost tests

    Proof-pack scripts referenced deleted 1,300-line monoliths while invariants register still claimed they ran — auditors assumed coverage that didn't exist. fix_pack required file-absence evidence before cutover; route_lane kept it Investigator hygiene. Registry matched disk.

    Tools the agent called

    fix_pack route_lane
  • 0B

    HR tech

    ClearPath Talent

    18–28 hrs saved

    Skills map demo widget

    A static three-row chip map proved nothing; engineering proposed client-side D3 with invented weights while server constellation APIs already existed. ux_surface_pass and map_feature tied Expand, filters, and clustering to authoritative read models before wireframes.

    Tools the agent called

    ux_surface_pass map_feature user_flow
  • 11

    Media

    StudioPublish

    40–60 hrs saved

    JSONB drift 500

    Publish dashboard returned 500 when stored queue schema lagged reader expectations. Round 1 fixed the throw, but Round 2 found taxonomy saves not invalidating projections — UI would lie “ready” on stale verdicts. debug_defect plus journey_attest closed both classes in one train.

    Tools the agent called

    debug_defect journey_attest prism_frame
  • 12

    Regtech

    Atlas Compliance

    32–48 hrs saved

    Computing forever

    Audit summaries hung for 20+ minutes — ten concurrent recompiles stampeded advisory locks at 8s pooler timeout while SQL ran in 5ms. Team wanted global timeout increases. debug_defect classified missing in-flight dedupe and listed forbidden fixes.

    Tools the agent called

    debug_defect route_lane fetch_seam
  • 13

    Edtech

    Vertex Learning

    35–50 hrs saved

    Empty after save

    Lesson rows persisted with a success toast, but the plan panel stayed empty — the UI gated on a nullable hint while projections 500'd on cold miss. route_lane and fetch_seam rejected warm-all-first (60–90s hangs) and client-only fallback before multi-slice work.

    Tools the agent called

    route_lane fetch_seam fetch_auth architecture_lens
  • 14

    Construction

    BridgeWorks

    28–40 hrs saved

    Phantom 409

    First brief save returned version mismatch — timestamp OCC tokens lost microsecond precision through JavaScript Date — and recovery copy sent users to re-import workflows. route_lane, coding_principles, and plan_delivery drove integer revision counters and lane-specific conflict codes in one attested cutover.

    Tools the agent called

    route_lane coding_principles plan_delivery
  • 15

    Insurance

    Harbor Insurance

    24–36 hrs saved

    Release transparency

    Underwriters saw pass/fail gates with no artifact transparency; a seven-tile “what we're shipping” strip risked merge without proof. journey_attest returned ready_with_residual (21 nodes, 0 blocking); sentinel_closure signed horizontal seams. Shipped with residuals explicit.

    Tools the agent called

    journey_attest sentinel_closure architecture_lens
  • 16

    HR tech

    ClearPath Talent

    45–70 hrs saved

    One assistant brain

    Recruiting, onboarding, learning, and analytics each hardcoded different assistant actions — MCP and an assignment console would have added a fifth brain. map_feature, plan_delivery, and grill_questions locked one resolver, drop-reason codes, and CI guardrails before UI sprawl.

    Tools the agent called

    map_feature plan_delivery grill_questions
  • 17

    Media

    StudioPublish

    30–45 hrs saved

    Deletion test wins

    A spec still required a four-verb dropdown while a per-slot rerun strip already shipped the same backend — building the menu would introduce a second client resolver with zero new capability. grill_questions and architecture_lens failed the menu on the deletion test; doc cleanup only.

    Tools the agent called

    grill_questions architecture_lens
  • 18

    Edtech

    Vertex Learning

    16–24 hrs saved

    Structure brain first

    A headless cron worker was ready to wire Stage 2 outline generation beside the orchestrator — risk of divergent module plans and mismatched recipes. grill_questions audit_mode CONFIRM GO blocked Stage 2 until a pedagogy resolver landed.

    Tools the agent called

    grill_questions route_lane architecture_lens
  • 19

    Regtech

    Atlas Compliance

    50–80 hrs saved

    Targeted test recovery

    Remediation touched 50+ spec files; each guess triggered ~90-minute full CI. journey_attest smoke marked proven vs latent nodes; fix_pack anchored evidence per cluster. Recovery ran targeted bundles instead of shotgun CI.

    Tools the agent called

    journey_attest fix_pack pressure_test
  • 20

    Logistics

    FleetDispatch

    20–30 hrs saved

    Product decision menu

    Engineering was ready for org→depot cutover but product hadn't decided catalog scope, scope columns, assistant rail, or agent API safety — and coders started assuming answers. slice_issues, grill_questions, and map_feature produced a numbered decision menu in one agent session.

    Tools the agent called

    slice_issues grill_questions map_feature prism_frame

Hour ranges are method · typical wrong path (meetings, wrong fixes, full CI, parallel UI) vs attested path (one governed agent session). A senior engineer + agent pair. Not a guaranteed SLA. Not a compliance claim. Your repository's tests and CI still decide pass/fail.

The portfolio band. All 21 together.

If the patterns above all ran in your quarter — they won't all show up, but the shapes recur — the redirected effort adds up.

If the 21 patterns landed in one quarter

~509775

engineer-hours redirected

Redirected from wrong fixes, duplicate UI, false CI, and meeting loops. Not raw codegen throughput. Not a compliance claim. A summed estimate of the kinds of wasted time these patterns prevent.

By industry · 21 vignettes

  • Media 3
  • Edtech 3
  • Regtech 3
  • Insurance 2
  • Construction 2
  • Logistics 2
  • HR tech 2
  • Retail 1
  • Analytics 1
  • Fintech 1
  • Healthcare 1

How we talk about this. How we don't.

The framing rules we hold ourselves to when reporting these patterns. Useful if you're considering AADM and want to know what claims we'll make in front of your auditor.

We say

  • 12–18 hours avoided wrong Back button implementation and review cycle
  • debug_defect classified root cause in one session; forbade timeout padding
  • Round 2 journey_attest caught stale verdicts before ship
  • Vertical through_domain_and_data plus horizontal seams signed off

We don't say

  • AADM saved 90% of development
  • AADM fixed production
  • Zero bugs after AADM
  • Certified compliant

Honest boundary · AADM MCP frames problems, names seams, and enforces proof obligations. Your repository's tests and evidence still decide pass/fail. That's the line, and we hold it.

The best case study is yours.

Try the patterns on something real this week. Catch a classification bug, attest a release without theater, onboard a senior engineer in a week. When it works, tell us — we'll feature consenting teams here.

Catalog · 21 vignettes
Period · 2026-05-28 → 2026-06-27
Hours band · ~509–775 engineer-hours redirected