Quivr V2

An open-source engine that turns continuous content streams into search and monitoring.

Quivr V2 ingests content durably, makes it searchable within seconds, enriches it in the background and lets you follow a topic over time. The core stays generic: formats, AI models and business rules belong in plugins, so you can adapt Quivr to your domain without forking the platform.

Status: evaluation stage. The API is v0 and may change without notice. Do not

run it in production yet.

Why Quivr V2

Durable before fast. A write is acknowledged only once it is committed; outages

delay processing, they never lose or silently fail content.

Idempotent everywhere. Every write carries an idempotency key. Replays return the

same result, changed replays are conflicts, and corrections create new immutable Versions instead of overwriting history.

Useful early, richer later. Text is lexically searchable as soon as it is

segmented; embeddings and other enrichments arrive afterwards without blocking it.

Rebuildable indexes. PostgreSQL and S3 hold the canonical data; the search index

is a projection that can be rebuilt from durable artifacts.

Honest search. Every hit is rehydrated from canonical storage and re-authorized.

A dependency outage returns an error, never an empty "success".

Generic core, extensible edges. Connectors, normalizers, enrichers, retrievers and

delivery channels are plugin capabilities, not core code.

Architecture at a glance

flowchart LR
    client[Client / connector] -->|REST v0| api[Go API]
    api -->|commit receipt + intent| pg[(PostgreSQL<br/>catalog, receipts, changes)]
    api --> temporal[Temporal]
    temporal --> worker[Go worker]
    worker -->|canonical bytes, artifacts| s3[(S3-compatible storage)]
    worker -->|segments| weaviate[(Weaviate<br/>lexical + vector)]
    worker -->|text parts| ingest[core.ingest plugin]
    ingest -->|passages| tei[TEI · E5 embeddings]
    api -->|search, rehydrate, recheck| weaviate
    api -->|changes: polling / SSE| client

A single quivr binary provides the api, worker and migrate commands.

| Concern | Choice | | --- | --- | | Core | Go modular monolith (cmd/quivr, internal/…) | | Transactional catalog | PostgreSQL 17 | | Canonical bytes and artifacts | S3-compatible storage (SeaweedFS locally) | | Durable orchestration | Temporal | | Lexical and vector search | Weaviate | | Embeddings | Local TEI serving pinned multilingual-e5-small (384 dimensions) | | Contract | OpenAPI 3.1 in contracts/http/v0 | | Local runtime | Docker Compose |

Quickstart

Requirements (Linux x86_64, or macOS on Apple Silicon for make dev): Go 1.27.1, Docker with Compose v2, Python 3 with venv, Node.js 22+ and jq. The first run downloads pinned images and the E5 model (~1 GB).

make dev      # start dependencies, run migrations, launch API + worker
make check    # docs, contracts, vet and unit tests without Docker (about 2 min); run before pushing
make verify   # make check, then end-to-end journeys on an isolated stack
make down     # stop everything, keep data (make reset also deletes volumes)

make verify runs every feature's acceptance suite and one assembled monitoring journey on an isolated stack. It removes only its own project, even after a failure or Ctrl+C. It then prints the path of a report.md that names any failed step, the pinned versions and the dependency inventory. It runs on Linux x86_64 only, as in CI; see the remaining limits.

make dev prints the API address and the path of a generated config.json holding throwaway local keys; eval "$(make -s env)" exports the address, a key and a webhook destination. Then follow the Quickstart: create a Corpus, add an article, search it and get an alert, with commands that make verify replays against a real stack.

For a browser UI over the same API, run make demo and open http://127.0.0.1:5183 (see quivr-search/).

What works today

Corpora with scoped API keys per Organization, action and Corpus.
Durable, idempotent ingestion: inline text, bounded batches with per-entry

outcomes, verified uploads (presigned PUT + checksum confirm), structured Manifests, extensions and relations.

Corrections and withdrawals with immutable Versions and fenced withdrawn Records.
Search: lexical, semantic and hybrid, with canonical rehydration and access

rechecks on every hit, optionally within chosen Source Namespaces (filtered before ranking).

Change feed through polling and resumable SSE, plus catalog resync after

cursor expiry. List a Corpus's Records newest first by current-Version acceptance time, filter by time bounds, and read exact range counts through the API or CLI.

Saved Queries and Subscriptions, pinned and versioned; enabled Subscriptions turn

newly searchable Versions into unique Matches (/v0/matches), each with a Delivery. Matching is decided by a pinned alert-rule plugin (the subscription Contribution), batched per article. Both can be renamed without a new Version.

Keyword alerts through the first-party plugin plugins/alerts,

pinned by default in the local stack: - queries such as "Acme" AND (grève OR strike) NOT sport, with exact phrases, "any of", "none of" and grouping; - case, accents and punctuation are ignored, and words match whole; - metadata filters such as source:wire or author:"Jane Doe" (names mapped in the plugin configuration), and a filter alone is a valid alert; - each Match's evidence names the matched terms and the Parts where they matched (guide). - the browser demo's Alertes tab writes these alerts and shows what each one caught, live (quivr-search/).

Described alerts through the same plugin: a plain-language description such as

"Labour strikes at ports and harbours", judged by TypeSafe's Jev classifier, so rephrased and translated articles alert too: - the plugin batches ready checks and asks each distinct description once per batch; - an alert can be limited to chosen sources, whose other articles are never sent; - the Match evidence carries the classifier's score; - they are off without a TypeSafe key, because article text is sent to TypeSafe (guide); - the browser demo's Alertes tab offers them next to keyword alerts when the deployment has a classifier, and shows each caught article's score (quivr-search/).

Local meaning alerts through the same plugin: the meaning kind with

meaning_check: vectors compares a description with stored embeddings to catch rephrased or translated articles without an external classifier (text stays local only with a local embedding provider). keywords_or_meaning and keywords_and_meaning combine keyword and meaning checks (guide).

Subscription previews (POST /v0/subscription-previews): before saving an alert,

see which of the most recent articles it would have caught, judged by the same plugin with the same rules. A preview saves nothing and sends nothing, and it judges at most 50 articles; the demo's alert form shows it as you type.

Subscription owners: an application can create a Subscription for one of its

end users (an opaque owner such as user-123) or a global one, see the owner on the Subscription, its Matches, webhooks and change feed to route each alert, and list a user's active Subscriptions with GET /v0/subscriptions?owner=….

Correction and withdrawal notices for alerted Records: a correction that still

matches gets a linked successor Match (match.corrected), one that no longer matches gets match.no_longer_matches without a new Match, and a withdrawal gets match.withdrawn. Earlier Matches stay readable.

Signed webhook delivery (Standard Webhooks) to deployment-configured destinations,

with append-only attempt history, jittered exponential retries within a bounded delivery window, exhaustion, and no new attempt once a Subscription is disabled. The worker exposes delivery metrics on its probe listener (/metrics).

Projection rebuilds from durable artifacts as recoverable Operations, with cancel

and rerun.

Document step times: each Version reports when it was accepted, materialized, cut

into segments, made searchable, given vectors, evaluated by alerts, quarantined or withdrawn (steps). A key with observability:read lists the latest documents with their steps (GET /v0/admin/documents) and reads one document's timeline with each step's duration and plugin.

Typed retrieval mappings per Corpus (PUT /v0/corpora/{id}/retrieval): logical

fields pointing into source data take effect only when their rebuilt generation is validated and activated.

Connector Instances: scheduled pull acquisition into a Corpus, with write-only

deposited credentials and health, through the same ingestion path as pushed content. Delivered kinds: rss (RSS and Atom feeds), m365_mail (Microsoft 365 mailboxes) and x_list (first-party plugin plugins/x-list), which polls an X list: edits become corrections, deleted or protected posts are withdrawn, and health shows daily reads (guide). In webhook mode, X posts arrive in near real time through Filtered Stream webhooks relayed by the core to the plugin, with polling as the fallback (guide). The deployment credential_key is optional. Without it, credential deposits are refused with 503 credentials_unavailable, and everything else works. GET /v0/connector-kinds publishes each enabled kind's config and credential JSON Schemas, PUT /v0/connectors/{id}/schedule changes the polling interval, POST /v0/connectors/{id}/runs checks a source again now, and validation errors name the offending field as a JSON Pointer.

Secure source API routes (Plugin API 0.12): connector plugins declare POST push and GET challenge routes at /v0/connectors/{id}/api/. The engine checks a collection-scoped connector:push key, an instance-scoped bearer token, or provider signature policy, with timestamp and replay protection for signed pushes; accepted pushes return 202 with ingestion Receipts. Author guide.
Sources page in the web app (quivr-search, Sources tab): paste a site

or feed address and the web app finds its RSS or Atom feed (refusing private addresses), or add a suggested feed in one click from DEMO_FEED_SUGGESTIONS. Each source shows its health and last article, and can be paused, resumed or removed; a failing one can be checked again at once (Réessayer). Other kinds keep forms generated from their schemas, so new kinds need no UI change (guide).

Live feed page in the web app (Veille tab): everything entering the demo

Corpus, newest first, with source, time, title and excerpt. New items arrive over SSE, which the app's server relays from the change feed, and can be filtered by source (guide).

Operational metrics and correlated logs on each process's private probe

listener (/metrics, Prometheus text, bounded labels): - API: accepted commands and the pending-ingestion backlog; - worker: processing outcomes, time from acceptance to searchable, and delivery attempts and durations.

JSON logs link request, Receipt, Record and Version IDs (harness).

Retrieval measurement with a frozen workload (make measure), and **search

quality** on public French and English evaluation sets or a private set, nightly (make eval, guide). Share measurements through MLflow with an offline outbox, paired comparisons and a Pareto leaderboard (results guide).

Bounded search campaigns explore settings on public development or encrypted

private working sets, with a persistent Pareto front, daily/total caps, recoverable cleanup and daily summaries. Leads submit bounded proposals and exact usage receipts (guide). Configured campaigns confirm finalists on the full stack before opening settings PRs.

Private news evaluation builder: pluggable generation with configurable targets

and attempt budgets, pooled judgments, encrypted working/held-out sets and human review (contributor guide); real provider runs are operator controlled.

Plugin Protocol v0 contract (contracts/plugins/v0/) and quivr plugin inspect,

which validates a quivr-plugin.yaml and reports its compatibility, Contributions, schemas, secrets and limits.

Plugin registry and activation without restart: the plugins pinned at startup are

recorded in the database, with the active Pipeline Plan saying which plugin serves each role (a media type, an alert rule, a connector kind, ingestion, retrieval). An operator key with plugins:admin, which no Organization key gets, registers a plugin version running at an address; Quivr checks it with the Contract Runner, and one call activates it as a new plan that api and worker follow without restarting (Switch plugins without restarting). Work already started (a receipt's processing, a connector run, a rebuild) finishes on the plan it started on, even across a worker restart. The replaced version shows draining with the count of work still pinned to it, then inactive. Work whose pinned plugin disappears is quarantined with a diagnostic naming the plan and the plugin, never moved to the new version. Quivr never starts a plugin process. One call rolls back to the previous plan. A nightly run (make measure-upgrade) upgrades, drains, rolls back and backfills under continuous ingestion and checks that no article is lost and the API keeps answering (Upgrade a plugin with no downtime).

Backfill and vector space promotion: an operator fills a new embedding model's

evaluation space for a Corpus's past articles, whole or for a window, after a dry run of the volume, duration and cost (POST /v0/admin/backfills). The backfill runs paced below live ingestion, can be paused, resumed or cancelled, and resumes from its checkpoint after a restart. One call then makes search use the space, and the same call on the former space goes back (Fill a new vector space for past articles).

Plugin and search counters: each process counts every plugin call, search,

processing step, document received (per source namespace) and Match, with errors and latency, and writes the counts to PostgreSQL every few seconds (observability.flush_interval, default 5 s, the most a crash can lose). A key with observability:read reads its Organization's last hour, day or week from GET /v0/admin/stats/plugins, searches, steps, received, matches and top-queries; nothing is kept beyond 7 days. Top queries need observability.record_query_text, off by default because it stores query text. The same counters are on /metrics.

External normalizer: the startup configuration pins one plugin and routes Blob

media types to its normalizer. A Blob of a routed type, ingested by reference, becomes searchable through the plugin's Parts, and its Version shows provenance.normalization. An unavailable plugin is retried and never blocks the API or other ingestion. A plugin error, invalid output or exhausted retries quarantine the Version with a structured diagnostic, and an optional text route falls back to the built-in text path (guide).

Reprocessing quarantined Versions: after a plugin fix or rollback, an operator

lists quarantined Versions, runs a dry run, then reprocesses them with the active plan. The Operation is paced, resumable and keeps each Version's identity (guide).

Plugin-owned extension namespaces: the pinned plugin's declared namespaces are

registered at startup beside the built-in ones. Its normalizer's extensions are validated against their schemas and published on the Version, clients cannot write them (422 extension_namespace_owned), and retrieval mappings can map them into search.

Go and Python Plugin SDKs serve all five Contributions, with named source route handlers and an offline push-source sample. Both kits support push

routes and attachments. quivr plugin init scaffolds normalizers, alert rules and pull or push sources, and quivr plugin dev, which runs it locally, checks its discovery digest and replays a fixture through the engine's Manifest validation, without a Quivr stack (SDK guide).

Plugin Contract Runner (quivr plugin test), which certifies a normalizer over

the public protocol, launched from its manifest or at --endpoint . It runs health, discovery, normative and plugin fixtures, deterministic replay, the declared deadline, terminal errors for invalid requests, and compatibility ranges. It judges output with the engine's own validation: Manifest rules, response size, input-Blob-only Blob Parts and declared namespaces. It writes a JSON report with --report, and CI publishes one for the quivr plugin init template.

Searchable PDFs through the reference plugin plugins/pdf-text

(pypdf, BSD-3-Clause). An application/pdf Blob becomes one body Part per page with text, and a phrase is found on its page's Part. Blank or scanned pages give warnings; encrypted or damaged PDFs are quarantined with a diagnostic naming the plugin. make dev pins it by default; there is no OCR (guide).

quivr search from the command line: set QUIVR_API_URL and QUIVR_API_KEY,

then quivr search --corpus "query" prints ranked hits with their excerpt and Record / Version / Part provenance, or the unchanged API response with --json. Failures exit with one code per class (rejected key or scope, invalid request, unreachable server). It uses a Go client generated from the contract (package client) and never touches the stack's storage (guide).

AI agents search and cite Quivr over MCP: quivr mcp --profile read serves an

agent on stdio with three read-only tools. The agent can list the Corpora its key reaches, search them, and read a hit's Record Version and Manifest, keeping Record, Version, Part and exact excerpt offsets to cite. --profile ingest adds text to a Corpus and follows its Ingestion Receipt until it is searchable; retries never duplicate, and no tool deletes. The API key alone decides access (Connect an AI agent).

A guide to writing a normalizer: scaffold, run, certify, pin, ingest and observe

your own plugin (Write a normalizer).

Source collectors as plugins, in Go (Plugin API 0.3): the connector contract

(fetch a page after an opaque checkpoint, check_credential, classified errors), a Go Plugin SDK (sdks/go) that redacts credentials, and quivr plugin test checks that pages resume from their checkpoint and that no credential leaks. The core calls these plugins for scheduled and on-demand collection.

Protected source pushes: per-instance token buckets, TTL replay of

Idempotency-Key answers, optional CIDR allowlists with trusted proxy resolution, and accepted/refused audit events with per-instance admin statistics.

Segmentation and embedding as a plugin (Plugin API 0.6, the ingestion

Contribution): a pinned plugin declares the vector spaces it owns, one served and others for evaluation, cuts each article into segments with a vector per space and an optional keyword text, and encodes queries for its spaces. A Corpus moves onto it with a rebuild; GET /v0/corpora/{id}/vector-spaces shows each space's owner, role and coverage (Write an ingestion plugin). The first-party core.ingest plugin (token windows, E5) is pinned by default; the engine segments and embeds nothing itself. Optional hosted.embed selects a hosted model or OpenAI-compatible server by configuration, with OpenAI and Cohere v2 formats.

Search ranked by a plugin (Plugin API 0.7, the retrieval Contribution): a

selected plugin answers each search in up to three rounds, asking the engine for keyword, vector or hybrid candidates it has already authorized, then ranking them with an explanation per hit, under named profiles with a latency and cost budget (GET /v0/search/profiles). Several retrieval plugins can be pinned together: search accepts full plugin/profile names or short names configured in retrieval.profiles, including default (Write a retrieval plugin). The first-party core.retrieve plugin (keywords, vectors or both) is pinned by default; optional settings select vector weight, candidate depth and relative-score or RRF fusion (defaults: alpha 0.5, search limit, relative score). The engine ranks nothing itself.

What comes next

Filtering on typed field mappings (filter roles are validated and stored today).

Documentation

The documentation site, docs.quivr.thevibecompany.co, is written for people who use Quivr and write plugins: an introduction, the Quickstart, core concepts, plugin guides, task guides and the reference. Its source is docs-site/; the HTTP, CLI, MCP and plugin references there are generated from the contracts.

This repository keeps the documentation for contributors, listed per reader on the start pages generated from docs/inventory.toml:

Using Quivr: the READMEs of the contracts, the demo and the

deployment, and the generated references.

Writing plugins: the READMEs of the SDKs, the plugin

contract and the first-party plugins.

Contributing to Quivr: change this repository, as a person

or a coding agent.

Repository layout

cmd/quivr/          single binary: API, worker, migrations
internal/           domain modules (content, corpus, retrieval, changes, monitoring…)
contracts/http/v0/  OpenAPI contract, examples and checks
contracts/plugins/v0/ Plugin Protocol v0 schemas and normative fixtures
sdks/go/            Go Plugin SDK for every Contribution
sdks/python/        Python Plugin SDK
plugins/pdf-text/   reference normalizer: PDF text, one Part per page
migrations/         ordered PostgreSQL migrations (UTC-stamped; legacy 0xx_ first)
scripts/            local stack, verification and measurement tooling
quivr-search/       demo web UI
deploy/             Docker Compose and Railway deployment
docs-site/          the public documentation site (Mintlify): authored MDX pages and generated references
docs/               contributor documentation, ADRs (docs/adr/) and dated documents (docs/dated/)
multimodal-rag/     earlier exploration (submodule), not the target architecture

Contributing

Read AGENTS.md and CONTEXT.md first; use the domain

vocabulary in code and docs.

Change the contract in contracts/http/v0/openapi.yaml, then run make generate.
Run make check before pushing and keep make verify green; add tests with

every behaviour change.

Declare every new living doc page in docs/inventory.toml

with one line giving its audience and kind (the file's header explains both), then run make start-pages; make docs fails on an undeclared page, a stale start page, a broken relative link or a missing repository path, and names the fix.

Document user-facing behaviour on the site, in docs-site/, in the same pull request;

run make docs-site after a contract change. Show API requests there as runnable blocks, which make verify replays.

Never edit an accepted ADR or a dated document under docs/dated/: supersede it

with a new one (ADR 0004); make docs compares them with where your branch forked from origin/main.

Pull request titles follow Commitizen conventions, for example

feat(ingestion): accept record versions.

Keep customer-specific formats and rules out of the core; they belong in plugins.

License

MIT — see LICENSE.

The-Vibe-Company/quivr: An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plugins for formats, models and business rules.

Quivr V2

Why Quivr V2

Architecture at a glance

Quickstart

What works today

What comes next

Documentation

Repository layout

Contributing

License

Reading Mode

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