`ninja plugin build` compiles a plugin to reactor-mode wasip1 wasm (Go >= 1.24
enforced), extracts manifest.pb by driving one HOOK_DESCRIBE over wazero with
failing host stubs, and packs a tar.zst .bnp (plugin.wasm, plugin.mod,
manifest.pb + migrations/schemas/assets/web-dist when present) with a summary
table. A describe-time capability call (e.g. db.* from Register) fails with an
actionable error naming the offending method. `ninja plugin verify` re-runs the
CMS reader's layout/name/abi/path-safety/size checks standalone (deliberate
duplication of cms backend/plugin/bnp/reader.go; kept in lockstep by WO-WZ-010).
ABI riders (additive; buf breaking clean):
- ABI_ERROR_CODE_TX_EXPIRED enum value + bnwasm guest mapping to a new
bnwasm.ErrTxExpired sentinel (retryable tx expiry, distinct from real faults);
the cms dbexec side adopts the emit separately.
- PluginManifest.data_dir bool + a first-class `data_dir` key on the plugin.mod
parser (so writeMod's struct round-trip can't drop it); `plugin build` stamps
it from plugin.mod into the manifest.
Docs: wasm-abi.md gains a Building & packing section, the error-code table row,
the manifest data_dir mapping, and the plugin.mod reference. Tests: CLI e2e
builds the WZ-002 fixture → verify + manifest block keys; a capfixture proves
the actionable describe-time error; verify rejects each malformed class;
bnwasm TX_EXPIRED classification.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Guest-side database access over the db.* host calls (abiv1 db.proto),
two surfaces sharing one injected transport:
- database/sql driver registered as "bnwasm" (driver.go) — QueryContext/
ExecContext/BeginTx over db.query/db.exec/db.tx_*; named args rejected.
- plugin.Pool (pool.go) handing out a pgx.Tx-shaped value (tx.go), so the
pgx-flavored sqlc DBTX every current plugin generates against
(sql_package: pgx/v5) is satisfied with no source edits. This is the
primary path: their DBTX needs pgconn.CommandTag/pgx.Rows/pgx.Row, which
database/sql cannot produce.
DbValue↔Go mapping (dbvalue.go) covers all 11 oneof arms both directions;
DbError surfaces as *pgconn.PgError (SQLSTATE preserved for errors.As);
nested tx/savepoints rejected with a clear error (no fleet plugin uses
them). The scan contract is pinned in the exported DbValueFixtures table
(dbvalue_fixtures.go) that the WO-WZ-007 host executor mirrors.
Tests: driver_test.go (fake host — every DbValue variant round-trips with
correct scan types, exec rows-affected, ordered host-call assertions for
tx commit/rollback sequences, post-rollback autocommit carries no handle)
and sqlcgen_test.go (vendored sqlc-style Queries + WithTx run against the
fake host). Native + wasip1 builds green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
