Review: Sprint 2: SDK implementation -- postmark-account-sdk (re-review)

Verdict: APPROVED

Prior Issues -- Resolution

• [x] [LABEL] arch:api changed to arch:domain-postmark -- arch-domain-postmark note verified, belongs to postmark project
• [x] [BODY] tests/test_templates.py added to File Targets -- Templates API group now covered
• [x] [SCOPE] Project page exists at postmark-project-page -- user-stories section confirmed with story key "sdk" linking to story-postmark-sdk

Template Completeness

• [x] Type -- Feature
• [x] Lineage
• [x] Repo
• [x] User Story
• [x] Context
• [x] File Targets -- 7 items (pyproject.toml, src package, conftest, 4 test files)
• [x] Feature Flag -- none (appropriate for SDK/infra work)
• [x] Acceptance Criteria -- 6 items
• [x] Test Expectations -- 2 items
• [x] Constraints -- 5 items
• [x] Checklist -- 3 items
• [x] Related

Traceability

• [x] story:sdk label -- Postmark SDK Foundation
• [x] story note verified -- story-postmark-sdk exists in pal-e-docs
• [x] story note on project page -- found in postmark-project-page user-stories section, key "sdk" links to story-postmark-sdk
• [x] arch:domain-postmark label -- Postmark Domain Model
• [x] arch note verified -- arch-domain-postmark note exists in pal-e-docs, documents PostmarkAccountSDK entity model
• [x] Forgejo issue -- ldraney/postmark-account-sdk#2, open

File Targets

• [x] pyproject.toml -- new file, project config with pytest/httpx dependencies
• [x] src/postmark_account_sdk/ -- new SDK package (detailed structure in docs/acceptance-criteria.md: __init__.py, client.py, servers.py, domains.py, senders.py, templates.py)
• [x] tests/conftest.py -- shared fixtures, token loading
• [x] tests/test_servers.py -- Server Management API (5 endpoints)
• [x] tests/test_domains.py -- Domains API (9 endpoints)
• [x] tests/test_sender_signatures.py -- Sender Signatures API (8 endpoints). Note: acceptance-criteria.md calls this test_senders.py; cosmetic naming difference, not blocking since the doc is the detailed guide per Constraints section.
• [x] tests/test_templates.py -- Templates API (1 endpoint: PUT /templates/push)

Repo Placement

Dependencies

• Blocked by #1 (docs PR) -- RESOLVED. Board item #1911 in done column, PR #4 merged.
• Sibling: ldraney/postmark-server-sdk#2 (board item #1914, 8 points) -- parallel server SDK issue, same sprint 2, same pattern. No ordering dependency.
• Downstream: Sprint 3 items depend on SDKs:
• Dependencies documented in Lineage and Related sections.

Acceptance Criteria

• AC1: "Every endpoint in postmark-account-api.yaml has at least one test" -- verifiable by cross-referencing swagger (23 endpoints across 4 groups per docs/acceptance-criteria.md)
• AC2: "All tests pass against the real Postmark API" -- verifiable via pytest tests/ -v
• AC3: "SDK client handles auth via POSTMARK_ACCOUNT_TOKEN env var" -- verifiable
• AC4: "Error responses are handled gracefully" -- verifiable (agent interprets as proper exception handling)
• AC5: "Tests are organized by API group matching the swagger spec sections" -- verifiable by file structure, 4 groups confirmed in swagger
• AC6: "Destructive tests are safe" -- verifiable (create/cleanup pattern)

Blast Radius

Decomposition Assessment

• File targets: 7 files in 1 repo -- single-repo, under the >3 files across >2 repos threshold
• Acceptance criteria: 6 items -- at the >5 threshold boundary, but tightly coupled (single SDK implementation with cross-cutting quality constraints)
• Clear source of truth: swagger spec (23 endpoints) + docs/acceptance-criteria.md (complete endpoint-to-test mapping)
• Clear pattern reference: ~/forgejo-sdk
• Estimated agent work: 5-point story with established scaffolding. Manageable in a single agent pass.

Observations (non-blocking)

• Issue File Targets say tests/test_sender_signatures.py but docs/acceptance-criteria.md says tests/test_senders.py. The Constraints section directs the agent to "Read docs/acceptance-criteria.md for the detailed endpoint-to-test mapping," so the doc naming will prevail. Cosmetic only.

Recommendation