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blog: four things to build with Vercel Eve and Hindsight - #5699
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hindsight-eve v0.3 is built on eve's memory provider contract, which closes the two gaps the July v0.2 post documented: recall now runs on the live user message instead of a fixed broad query, and every locked scope gets its own bank instead of one bank for everyone. One authored file replaces two. Cover pairs eve's own mark (.github/assets/eve.svg) with the Hindsight glyph.
Same release, different angle. Instead of a changelog of what v0.3 changed, teach the contract itself — recall / capture / tools, the locked scope key, the operation id — with the Hindsight provider as the worked example. Covers the three rules that are easy to get wrong: partition inside the query rather than filtering after, treat operationId as an idempotency key, and never let recall throw, since a throwing recall fails the turn before the model call.
benfrank241
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Open on the gap in eve's own tutorial — it stores the team's metric glossary in defineState, which lives for one session — then four things that change when the memory outlives it: a team-scoped glossary, one customer across every channel, tenant isolation that is a scope rather than a filter, and pointing a slot at a bank the team's coding agents already wrote.
benfrank241
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Review feedback: the preamble assumed you had read eve's tutorial, so the first four sentences critiqued a doc the reader cannot picture, introduced defineState unexplained, and never said what the post was about. Opens on the concrete situation instead. The defineState observation moves into use case 1, where it has context and reads as evidence rather than as the premise.
This was referenced Oct 20, 2026
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A use-case post rather than a release note.
Eve's own tutorial teaches the analytics agent the team's metric glossary using
defineState, which their doc describes as surviving "across step and turn boundaries within a session." Right instinct, container one size too small — the glossary is a fact about the team, not the conversation. The post opens there and covers four things that change once the memory outlives the session:byPrincipalkeys on principal type, authenticator, issuer and ID, so two channels share memory only when one identity provider says they are the same person.bankIdpins every scope to one bank, which is right for an internal agent and wrong for a customer-facing one.Scope, visibility and null-resolver behaviour are taken from
docs/patterns/multi-tenant-memory.mdanddocs/memory/overview.mdxonvercel/eve@main;byPrincipal's key composition frompackages/eve/src/shared/principal-scope.ts. Our own behaviour is verified againstorigin/main, and the quick-start was built end to end on eve 0.80.1 + hindsight-eve 0.3.1.Cover pairs eve's own mark from
vercel/eve.github/assets/eve.svgwith the Hindsight glyph.Two files: post + cover.
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