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feat(core): replace instruction checkpoints with value-delta sync (#36254)

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Kit Langton 2026-07-10 13:26:25 -04:00 • committed by GitHub
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packages/core/src/database/migration/20260710025429_instruction_sync.ts Normal file
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import { Effect } from "effect"
import type { DatabaseMigration } from "../migration"
export default {
id: "20260710025429_instruction_sync",
up(tx) {
return Effect.gen(function* () {
yield* tx.run(`ALTER TABLE \`session\` ADD \`fork_seq\` integer;`)
yield* tx.run(`PRAGMA foreign_keys=OFF;`)
yield* tx.run(`
CREATE TABLE \`__new_instruction_entry\` (
\`session_id\` text NOT NULL,
\`key\` text NOT NULL,
\`value\` text,
\`removed\` integer DEFAULT false NOT NULL,
\`time_created\` integer NOT NULL,
\`time_updated\` integer NOT NULL,
CONSTRAINT \`instruction_entry_pk\` PRIMARY KEY(\`session_id\`, \`key\`),
CONSTRAINT \`fk_instruction_entry_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
);
`)
yield* tx.run(`
INSERT INTO \`__new_instruction_entry\`(
\`session_id\`, \`key\`, \`value\`, \`removed\`, \`time_created\`, \`time_updated\`
)
SELECT \`session_id\`, \`key\`, \`value\`, false, \`time_created\`, \`time_updated\`
FROM \`instruction_entry\`;
`)
yield* tx.run(`DROP TABLE \`instruction_entry\`;`)
yield* tx.run(`ALTER TABLE \`__new_instruction_entry\` RENAME TO \`instruction_entry\`;`)
yield* tx.run(`PRAGMA foreign_keys=ON;`)
yield* tx.run(`
CREATE TABLE \`instruction_blob\` (
\`hash\` text PRIMARY KEY,
\`value\` text
);
`)
yield* tx.run(`
CREATE TABLE \`instruction_state\` (
\`session_id\` text PRIMARY KEY,
\`epoch_start\` integer NOT NULL,
\`through_seq\` integer NOT NULL,
\`initial_values\` text NOT NULL,
\`current_values\` text NOT NULL,
CONSTRAINT \`fk_instruction_state_session_id_session_id_fk\` FOREIGN KEY (\`session_id\`) REFERENCES \`session\`(\`id\`) ON DELETE CASCADE
);
`)
// Persisted System rows were exclusively pre-beta instruction prose,
// including fork copies whose message IDs no longer match the source event.
yield* tx.run(`DELETE FROM \`session_message\` WHERE \`type\` = 'system';`)
yield* tx.run(`
UPDATE \`session\`
SET \`fork_seq\` = COALESCE(
(
SELECT MIN(\`seq\`) - 1
FROM \`event\`
WHERE \`aggregate_id\` = \`session\`.\`id\` AND \`seq\` > 0
),
(
SELECT \`seq\`
FROM \`event_sequence\`
WHERE \`aggregate_id\` = \`session\`.\`id\`
),
0
)
WHERE \`fork_session_id\` IS NOT NULL;
`)
yield* tx.run(`
UPDATE \`event\`
SET
\`type\` = 'session.forked.2',
\`data\` = json_set(
\`data\`,
'$.parentSeq',
COALESCE(
(SELECT \`fork_seq\` FROM \`session\` WHERE \`id\` = \`event\`.\`aggregate_id\`),
0
)
)
WHERE \`type\` = 'session.forked.1';
`)
yield* tx.run(`DELETE FROM \`event\` WHERE \`type\` = 'session.instructions.updated.1';`)
yield* tx.run(`DROP TABLE \`instruction_checkpoint\`;`)
})
},
} satisfies DatabaseMigration.Migration