glm-5.3-flash abf8c5ae9c docs(architecture): ADR-010/011 — I/O seams, GC-state home, vocabulary; pre-decomposition consistency round
ADR-010 (new): the Backend trait's I/O seams pinned before any code —
'get' returns a crate-internal read cursor (kv engines materialize;
'local' pread loop; pg-lo lo_get windows), 'put' has two named forms
(whole-value kv / staged-put large); GC state is store-core-owned via
a crate-internal contract-tested engine-state seam on the SQL-backed
engines (backends never learn liveness — ADR-005 verbatim); the store
core holds the joint entry+pin transaction (corrects ADR-009 §2's
ownership statement); kv-tier fleet-validity rule added (mirror of
ADR-008 §3); ops pin-token TTL race resolved (the token IS the pin;
renewal rides have/re-put; pause-past-TTL falls to delete-then-recover);
feature graph pinned (pg-lo does not imply postgres).

ADR-011 (new): vocabulary pinned — tier (contract, exactly two) vs
engine (concrete impl, exactly five); store instance / node / fleet
split (fleet = pool-sharing, not node count — fixes requirements.md's
self-contradiction with REQ-2); mem demoted from 'backend'/'testing
tier' to the kv tier's third engine (contract-reference engine);
fs tier renamed 'large' including the feature name (last free moment
before code exists); constructor modes pinned (dual-tier default,
kv-only, mem-only) plus the composite fleet-validity predicate.

Consistency round across all specs and ADR-003/004/007/008/009: stale
pg-lo passages resolved per ADR-009's supersession; ADR-008 owner
'node id' → store-instance id; threshold wording corrected (conservative
edge, not midpoint, of the 128-256 KiB crossover zone); SweepReport
shape specced; mem classification unified; 008/009 ADR files renamed to
match the tier rename; README deferral-policy recap aligned (third
category = decided-but-sequenced work, not a parking kind); POC crate
list completed.

Verification: two independent architecture review rounds (the first
found 4 criticals — unpinned trait I/O shapes, missing fleet-state
seam, node/fleet self-contradiction, pin-token/TTL conflict — all
resolved; final round: zero criticals); all markdown links resolve;
ADR tables complete (11 ADRs).
2026-10-03 05:55:20 +00:00
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