Store and extend complete RDF/OWL documents through MCP. import accepts Turtle/N-Triples/N-Quads/TriG without conversion; update executes INSERT DATA for additive edits. Replacing/removing axioms is unsupported; use a new versioned LBB graph for a revised document. Named RDF graphs are unsupported; Turtle/N-Triples use the default graph, and dataset formats must contain only default-graph quads. These write graph facts, distinct from lbb_configure's native schema metadata. A first RDF write selects RDF-native storage, which refuses later property-graph commits; choose the write workflow before bootstrap. Retries deduplicate by content unless idempotency_key is supplied. A completed write schedules publication; inspect action=publication and verify using lbb_query entailment=owl. An update with DELETE, CLEAR, DROP, MOVE or COPY asks the person to approve it first; the question quotes the operations that remove. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Files of the graph, read only. A file is a document the graph holds (its bytes and a Document entity). A file a workflow run wrote (a generated file, with an origin and an expires_at) has no Document and no Document IRI. It expires unless a person keeps it, so the list shows it only after that, and it is never evidence for a fact. The documents.parse workflow (lbb_workflows) reads the text layer of each PDF into pages with every line and its box. list shows 50 files a call, newest upload first, with their sha256, name, size, Document IRI and parse (status parsed, unsupported or failed, page_count); when more follow, next names the after of the next call (with the same filters). parse_status keeps the files of one parse status; waiting is a file not parsed yet. name keeps the files whose name holds a text, in any case. A filtered list reads the Documents of the published generation and names its commit (as_of_commit_seq). A file uploaded, renamed or parsed a moment ago can be missing from it until publication. pages reads parsed pages of one file (sha256, or name for an exact file name): from is the first 0-based page index (the page of a region and of a DocEntry or DocMention), to the page after the last one (default from+1). Each line comes as <line id> [x0,y0,x1,y1] <text>: the id is p-l, both from 1, and the box is normalized to the page (0 to 1, origin top left). contains keeps the lines that hold a text; max_lines caps the lines (default 200). When lines were left out, next names the from and line_offset of the next call. A file not parsed yet answers file_not_parsed.

Review items, read only: questions for a person (human in the loop) that workflows, integrations, agents and people file. Kinds and their decisions: change (accept an ontology change, identities or facts: accept, reject, cant_tell), value (confirm one value of a property, question.property and question.value: accept, correct with the right value, reject, cant_tell; accept and correct commit the value), choice (pick one of question.options: choose with option, cant_tell), grade (grade question.output on the scale question.options: choose with option, cant_tell), answer (answer question.prompt in words: accept with the text in note, cant_tell). Status is open, answered or withdrawn. Scope is live (default) or test: a test item writes nothing. list returns one page as the server sends it ({object, data, has_more, next_cursor}), the latest update first: pass next_cursor as cursor, with the same filters, for the next page. get reads one item (rev_…) with its question, evidence, answer and effects. patterns groups the live items that ask one decision, the largest first. Evals files the questions of model checks (origin_id evals:checks), calibration sessions (evals:calibration), golden queries (evals:golden) and the values the two arms of an experiment differ on (evals:datasets) as grade and choice items; eval_id keeps the items of one record (for evals:datasets, the dataset), and their answer is the record's label. An item of evals:datasets asks whether one value is right or wrong, and the origin names the dataset item, the property and the value. File, answer, comment on or withdraw items with lbb_reviews_manage.

File, answer, comment on or withdraw review items. Show the item to the user and answer only what the user decided. Kinds and their decisions: change (accept an ontology change, identities or facts: accept, reject, cant_tell), value (confirm one value of a property, question.property and question.value: accept, correct with the right value, reject, cant_tell; accept and correct commit the value), choice (pick one of question.options: choose with option, cant_tell), grade (grade question.output on the scale question.options: choose with option, cant_tell), answer (answer question.prompt in words: accept with the text in note, cant_tell). Status is open, answered or withdrawn. Scope is live (default) or test: a test item writes nothing. An answer that accepts or corrects a value item, or accepts a change item, commits facts or applies an ontology change (which can remove types and relations): the server reads the items and asks the person to approve first, with the count and the effect. Any other answer, such as the grade or choice of an item Evals filed, asks nothing. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow. create files an item of kind value, choice, grade or answer (kind, title, question, and optionally subject, evidence, rationale, key, scope, facts, origin); the same key again updates it, and an answered item comes back unchanged. File an ontology change with lbb_configure action=suggest_ontology_change. answer records the person's answer (decision, with value for correct, option for choose, note). An item has one answer: the same answer again returns the item, another one answers 409 review_answered. revision is the revision the person saw; a later one answers 409 review_stale. answer_batch gives one answer to up to 500 ids. comment adds text to an item's discussion. withdraw takes back an item you filed, with a reason. Each write sends an idempotency key, and a retry after a network failure or a 5xx sends the same key, so the write happens once.

Read graph context and exact graph facts. Actions: guide, graphs, publication, ontology, ontology_conformance, schema, ontology_search, metadata, entity, ontology_suggestions. graphs works before bootstrap; ontology_suggestions lists the ontology change suggestions that wait for review (or were decided); fact_count is how many graph facts (triplets and entity property rows) accepting one commits, and identity_count how many identities it links. publication reports whether writes are queryable. ontology and schema return complete entries with page_size, section and cursor; follow next until absent. schema reads active native ontology/SHACL metadata without running validation. Query asserted RDF/OWL axioms separately with lbb_query. ontology_conformance serves the durable report referenced by the pinned published root. entity with iri, or version=records/1 and entity_id or entity_type+key, returns a complete exact-term record, separate assertions and snapshot from RDF. as_of_commit_seq pins retained history; schema-bound historical selection is currently unsupported. Oversized records fail rather than truncate. Omitting the new selectors preserves the native attributes/relationships view. Use lbb_query with SPARQL property paths for precise path selection.

Analytical and expert reads. Modes: question (a question in plain words), structured (SPARQL-subset JSON body), sparql (SPARQL text), search (instances by meaning over every searchable class; filter narrows by class and relationship; every hit checked against the graph), analyze, and four tools for writing your own queries: names, describe, commit_at, compare. names: before a query that names an entity (a person, a company), find its IRI with text=; use the first candidate, not a CONTAINS match on the name. describe: before a query on classes or properties you have not seen, read them with question= (or classes/properties as IRIs): how many sampled instances hold each property (a filter on a rare one returns few rows), the values of small classes such as stages, examples and schema statements. commit_at: for a question about a date, find the commit of date=YYYY-MM-DD (or moment=RFC 3339), then run mode=sparql as_of_commit_seq=. compare: for what changed between two points, run one SELECT at before and after (default the latest) with key=[the entity variable]; added, removed and changed come with totals and pages (next). Use mode=question when you have a question in plain words and no SPARQL query: the server picks the kind of question (route), runs queries in a bounded loop, reads their rows, and answers in plain words (about 8 s). The result holds the answer with citations and a chart hint (kind, x, y: columns of the rows), the steps, the route, and the query and rows the answer stands on. Continue or correct that query with mode=sparql. Each question uses model tokens and counts toward a daily limit of the stack. SPARQL is the query language; search finds what the words describe. SPARQL text can also search by meaning inside the query with ?x https://littlebigbrain.com/search#similarTo "words", so the other patterns filter and join the hits in one query; the result's search field reports the plan. To plan a search: lbb_embeddings action=list, then SPARQL for a class's relationships on a sample, then mode=search with explain=true to check the resolved filter before the real search (lbb_inspect action=guide has the queries). Use the exact IRIs returned by names, describe or RDF. Native records use content-addressed entity IRIs, https://littlebigbrain.com/r/NAME relations and https://littlebigbrain.com/class/NAME types (lowercased); imported RDF may use any vocabulary. Never build an entity IRI from a display name. Structured and text queries pin one published watermark for the request.

Read model-training inputs or compare retrieval configurations over one pinned published snapshot, or read what the managed models did. shadow_eval takes the API ShadowEvalRequest body; dataset actions return bounded training examples at an optional signal split. activity reads one month of the stack's model use (all graphs): calls, items, estimated tokens and cost per feature (index, search, fit, judge, training, rerank, rewrite, trial, workflows) and model, by day and by graph, the workflows' calls per workflow and job (by_workflow), the months with activity, and the model each feature uses now.

Search setup, read only: embeddings declared on classes (an embedding on a class covers its subclasses; one model per graph). list shows each embedding's status (serving and building version, backfill progress, lag) and the graph's model; get shows one; preview shows every candidate fact of a class with its coverage and examples, and the exact text of sample instances, and stores nothing. Declare, refresh, or change the model with lbb_embeddings_manage; search with lbb_query mode=search. list is the first step of planning a search (lbb_inspect action=guide has the recipe).

Declare or refresh an embedding, or change the graph's model. Run lbb_embeddings action=preview first and show the user the text it will embed. declare sets the class, the fields (one-hop property paths such as label, description, calls/label; omit for an automatic choice); a new embedding takes the graph's model, and another model is refused. On an existing embedding it changes only what you name, and a changed recipe builds a new version while the old one serves. model moves every embedding of the graph to model: each builds a new version, and the graph switches when all are ready (a search never mixes two models). refresh runs one step of the embed job now (it also runs by itself after each published commit).

Delete an embedding: its name and its vectors (index-gc removes the stored runs). Its class stops being searchable until it is declared and built again. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Fit from text, read only: fit sources declared on classes. A fit source names the fields of a class that hold text (transcripts, documents); the server reads every instance, proposes ontology changes (classes, properties, relations) with verbatim quotes, checks them, and files them as ontology suggestions with origin id fit:. list shows each source's status (progress, lag, instances read, proposals kept and dropped, suggestions per status, this month's spend, last error) and the stack's monthly budget; get shows one; preview shows the fields, every candidate field of the class and the text of sample instances, calls no model and stores nothing. Declare, refresh or dry-run with lbb_fit_sources_manage; list the suggestions with lbb_inspect action=ontology_suggestions.

Declare, dry-run or refresh a fit source (fit from text). Run lbb_fit_sources action=preview first and show the user the text the fit reads. dry_run runs the models on the first part of up to 3 instances (at most 60 s; truncated when one did not finish) and returns every proposal with its quote, its support score and what the checks made of it; it files nothing but spends model budget. declare sets the class, the fields and the context; the job then reads every instance and files suggestions (an existing source changes only what you name). refresh asks the job to run now and returns the status at once; the job also runs by itself after each published commit, so poll lbb_fit_sources action=get for progress. Nothing changes the ontology until a person accepts a suggestion.

Delete a fit source: the fit stops reading its class. The suggestions it filed stay. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Starter workflows and triggered workflows, read only. A starter workflow is a template; a triggered workflow is a workflow created from one on the graph. It watches a class: when a published commit adds or changes instances of the class (or changes the watched fields), the workflow reads them and does its work. search.embed keeps an embedding of the class (the same as lbb_embeddings); ontology.fit reads text fields and files ontology suggestions (the same as lbb_fit_sources); workflow (a developer workflow) sends the new and changed instances to a workflow of the developer's worker as trigger messages, and that code writes the facts the workflow owns. documents.parse reads uploaded PDF files into pages with line boxes, documents.link connects mentions of the same thing across the documents (it writes DocEntry and DocMention instances and links each mention to the entry that defines or describes it), documents.map proposes each link as a FactProposal in the graph's own ontology (fact_subject, fact_predicate, fact_object, fact_confidence, fact_evidence) for a review workflow, and values.extract fills chosen properties from text, each value with a quote; read the files and their pages with lbb_files. starters lists the starter workflows this server offers with their group, settings and whether each can run here. list shows every triggered workflow of the graph with its state (backfilling, ready, paused, failed, unavailable), lag, counters, this month's spend and last error; get shows one (starter and name) with its own status in details (for workflow: the messages sent, the instances waiting, the message in flight and whether it is paused). preview shows what creating one would do (the resolved watch, the instance count and the workflow's own preview; for workflow, the first messages it would send), calls no model and stores nothing. workflows lists the same workflows as workflows with triggers (/v1/workflows/named): each one's target workflow type (LBB's own are lbb.* types), its shards (engine identities starter. and starter..), its routing field, its window, its one watch trigger, its status and each shard's inbox, one page in data (has_more and next_cursor page them with cursor and limit); name for one. queue (name) shows what a workflow's watch has not sent yet: each waiting instance with its shard and its origin (a backfill, a commit range with the watched fields and the requests that changed it, a run now, a schema change), the pass in progress, and per shard its message in flight and its first unfinished turns with their origins; the items are in data, and has_more and next_cursor page them with cursor and limit. run_results (name) shows what the workflow's runs did with each input, newest run first: the input's IRI and label, its outcome (written, review, no_value, failed, duplicate) and its values (the value, the quote that states it, its support, the conversion, and the review item it went to); run keeps one run (with run_counts, every input by outcome), outcome keeps some outcomes, iri keeps one input; data, has_more and next_cursor page them. A run records its results when it ends; they are kept 30 days. revisions (name) shows the history of a workflow's settings, newest change first: each item is a revision (settings, the request that makes it, and an id wrev_… that is the hash of the settings) with who changed it, when, how (create, change, activate, existing) and bound (the one in use); a row whose revision was deleted has available false and no settings; has_more and next_cursor page it with cursor and limit (1 to 100, default 20). last_tested on a revision of a workflow that has tests (values.extract) says what the workflow's tests read with those exact settings: an object (test, finished, counts, and experiment when the test is an arm of an experiment) names the newest test that read inputs with them, null means no test is recorded for those settings, and no key means the workflow has no tests or the server does not say; it shows what happened and gives no verdict. revision (name, revision) reads one revision; compare two by their settings to say what changed. Each run summary names the revision it ran on. Message workflows of the workflow engine are not listed here. tests lists the graph's workflow tests, newest first, without texts and results (name: one workflow's tests), one page with next_cursor; tests_get reads one test (id) with its inputs' texts and, per input, each value read with its quote, its support and what the live workflow does with it (writes it, gives it to review, or drops it). A test goes queued, running, then done, failed or cancelled. Create, refresh, pause or resume with lbb_workflows_manage, which also starts, answers and cancels tests and goes back to an earlier revision with its action activate; delete with lbb_workflows_delete.

Create a workflow from a starter workflow, or refresh, pause or resume a triggered workflow. Run lbb_workflows action=preview first and show the user the watch and the instance count. use creates a workflow from a starter workflow of action=starters, under a name (default: the class's local name), with its watch (class, fields) and params; the workflow then reads every instance of the class and follows each published commit. A developer workflow (starter=workflow) also takes workflow (workflow_type and version of the developer's worker), owns and batch; it needs a server with the workflow engine. use again with the same starter and name changes only what you name, and the same request again changes nothing. A workflow that calls models (ontology.fit, documents.link, documents.map, values.extract) spends model budget as it reads. refresh asks the workflow to run now and returns at once with queued; poll lbb_workflows action=get for progress. pause stops a workflow (a developer workflow, documents.parse, documents.link, documents.map or values.extract) from reading and sending, and stops the claims of a developer workflow's shards; resume lets it catch up. Without starter, pause and resume name a workflow with triggers. search.embed and ontology.fit cannot be paused. define creates or changes a workflow with triggers of the developer's worker (/v1/workflows/named): name, workflow, one trigger (class and fields for a watch, media_types for a content trigger on uploads, schedule for one run per slot of a timer, or stream for the events a client sends, in batches), owns, batch, and shards (engine identities, 1 to 16), route_by (a field that keeps work in order) and window (messages queued per shard, default 4), and optionally budget_usd_per_month (the workflow's own monthly model budget), on_exhausted (block or skip) and fan_in (the id of a fan-in identity the shards send to); it needs a server with the workflow engine, and a change of shards waits for empty inboxes. run (name) runs a workflow with triggers now: its watch sends every instance again, a content trigger reads its log again, a schedule sends one run outside its slots, a stream sends its partial batches. activate (name, revision) makes an earlier revision of a workflow's settings (from lbb_workflows action=revisions) the one in use: it goes through the same checks as a change, and answers the workflow with its active_revision. Show the user what changes first (compare the settings of the two revisions), and when the revision's last_tested is null say that no test is recorded for those settings and ask before you activate (activation stays allowed), and pass expected_revision, the revision you read as bound, so a change by someone else since fails with workflow_revision_conflict. A revision whose settings the graph now reads differently fails with workflow_revision_stale; then change the workflow instead. Activating changes what the workflow does from then on and deletes no data, so it is not a destructive write; a change of the watch, the parameters or the gate makes the workflow read its class again, and work that waits or runs keeps the revision it started with. tests_create tests a values.extract workflow on chosen inputs before it writes: name (a workflow of the graph; starter defaults to values.extract) or install (a workflow not created yet, as use takes it: starter, name, watch, params, gate), and iris (at most 20) or sample (1 to 20, default 6), and models to try other models before choosing one. A test reads each input as the workflow would and calls its models (the calls count in the monthly workflow budget); it writes nothing to the graph. Poll lbb_workflows action=tests_get. tests_answer records the person's answer to one value of a read input (id, iri, property, answer: accept, reject, correct with value, or cant_tell; null removes it); it writes nothing to the graph. Answer only what the user decided. tests_cancel stops a queued or running test (id). Save a test's answers as a dataset with lbb_evals action=datasets_create.

Delete a triggered workflow: it stops following its class, and what it wrote stays. Deleting search.embed deletes the embedding and its vectors, so its class stops being searchable; the suggestions an ontology.fit filed stay; a developer workflow leaves its workflow instance and the facts its code wrote. Without starter it deletes a workflow with triggers by its name, and its shards stay. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Model choice, read only: which model each use of a model on the graph runs, and trials that test other models against the graph's ground truth (the checked calls: a person's review, else the judge's verdict). options shows per use the model it runs now (current), LBB's model (default), a switch (switched), its checked calls, and the models a trial can test with their efforts, prices and whether the server holds their key; available=false with a reason when trials cannot run. trials lists the trials, newest first, each with its report: calls compared, both models' right share, mean score (0 to 1), cost per call and median time, the difference with its 95% interval (delta, ci_low, ci_high), outcome (too_few, better, same, worse) and qualifies (meets the bar: at least 20 calls, at most 5 points worse at the low end, no more failures, cheaper or better). trial reads one trial with its compared calls; trial_call reads one call with both answers and the ground truth. switches lists the switched uses. choices lists the model choices of the workflow uses (extract, decide, embed): without workflow the environment's row of each use and each workflow's own choice; with workflow the row in force for each of its uses (its own, else the environment's, else the default). A row has scope (environment or workflow), model, source (person or default), since, by, the model before, the use's default and options (the models it can run, with efforts, list prices and whether the server holds their key). One page in data: has_more and next_cursor page it with cursor and limit. Start, stop, switch or revert, and set or remove a choice, with lbb_model_choice_manage.

Model choice, writes. start tests a candidate model on the uses in jobs (without jobs, every use it can do that has checked calls): the server answers those checked calls again with the candidate and scores it and the model in use against the same ground truth. It changes no model and spends at most the trial budget ($3.00 by default) of model and judge cost; an open trial of the same use and candidate comes back as it is. Pick candidates from lbb_model_choice action=options (provider anthropic with an effort, or typesafe jev-latest). A trial runs by itself: poll lbb_model_choice action=trial until its status is no longer running. stop ends a trial; it keeps what it compared. switch makes the trial's use run its candidate on this graph from the next call on; only a trial that qualifies and compared with the model in use switches (ask to a Claude model, route to a Jev model). Show the user the trial's report (score, difference and interval, cost per call, time) and switch only what the user confirmed. revert puts the use back on LBB's model. put_choice chooses the model of a workflow use (use extract or decide, provider, model, effort) for the environment, or for one workflow with workflow: the next calls run it. Pick the model from the row's options in lbb_model_choice action=choices, show the user the price per million tokens of the model in use and of the new one, and set only what the user confirmed. delete_choice removes a choice: the use runs the environment's choice, else its default; it answers {id, object, deleted: true}. Both change only the model of future calls and remove no data, so neither asks for approval.

Managed evals: ground truth for the questions an app asks and the searches it runs. A query run with request (lbb_query, also mode=question) records a trace: the question, the query that answered it, the type of that query (query_type: sparql, hybrid = search by meaning with conditions, search = search by meaning alone) and one item per result (hit or row); trace reads it back with the item ids. label has two forms. On a question's trace, valid alone judges the whole answer: valid=true makes the trace's query the golden query of the question; valid=false with sparql gives the right query, which becomes the golden query; valid=false alone marks the answer wrong; route with valid=true (or valid=false with sparql) names the route the question expects, and valid=true alone takes the trace's route. item + valid (or items) judges one result, a citation of the answer: the ground truth of the hits of a search by meaning, and a result marked wrong must not come back for any type. golden freezes a stored query or a search (every result it returns now is relevant). run checks every golden at the current commit: a question is asked again through the query rewriter, then the type of the query it wrote is compared with the expected type, its rows with the rows of the golden query at the same commit (query_check), and its results with the judged results, and the router's pick with the golden's route (route_check, which does not change the verdict); a search is done again; new results open a review trace. run_answers checks your own app's answers instead: ask each question golden's request with your own loop, then send answers=[{golden, sparql, route}] (route = the route of lbb_query mode=question with route mode, sparql absent for an unanswerable question, error for a failure); the server runs each query and checks it the same way, and the runs form the app's own series (runner; results with runner reads them). judge lets the platform's judge model (the hosted frontier model) label unlabeled results. summary, traces, goldens, results, and settings read state. Model checks: a judge model checks a sample of the model calls LBB makes for the graph (rerank, route, ask = the answer of a question, rewrite, fit, propose, label). checks_summary reads a month per job and model (checks, score, right, partly, wrong, reviews) and the judge's agreement with people; checks lists the month's checks, newest first, with the judge's verdict, score and reason and the ground truth (truth). review_check records a person's review of one check (call_id): agree=true keeps the judge's verdict; agree=false with verdict (and an optional score, reference and note) corrects it. The review becomes the call's ground truth, so show the check to the user and review only what the user confirmed. Datasets: named sets of examples with the outputs a correct run gives, which workflow tests and template evals share. The kind values holds per item an input text (name, text, iri), the property values a correct run writes (values) and those it must leave out (leave_out). datasets lists the graph's datasets, newest first, without their items (one page with next_cursor); datasets_get reads one (id) with its items; datasets_export returns it as a template's samples, records (records.json) and expected (expected.json). datasets_create makes one with name and items (at most 500), install (the settings it is graded with: each property's value type, units, context) and about, or from a workflow test's answers with source={kind: test, id}. datasets_items adds items to a dataset (id); an item with the name of one it holds replaces it. Delete a dataset with lbb_evals_delete, which asks the person first. A dataset ends with its graph. Experiments: two configurations of a workflow, A and B, on the items of a dataset, with the difference of B against A and its 95% interval. A is the workflow as it runs now; b changes one part: {model: {use: extract or decide, model: {provider, model, effort}}} (a model from lbb_model_choice action=choices options) or {revision: wrev_…} (a kept settings revision), not both. Each arm runs as a workflow test that writes nothing to the graph and spends model budget; each item is graded against the dataset's labels. experiments_estimate shows the cost first (items, the cost of both arms, the limit, the budget left): call it, show the user the figures, and start only what the user confirmed. experiments_create starts one (workflow, dataset, b, optionally max_items up to 200 and max_cost_usd up to 100, default 5); poll experiment (id) until its status is done, failed or cancelled, and read report.delta with ci_low and ci_high (outcome too_few under 10 items, else better, worse or same) and the item rows. experiments lists them (workflow, dataset, status, one page with next_cursor); experiments_cancel stops one, keeping what it compared. None of them changes the workflow or the graph. To use B, make the change with the experiment's id: lbb_model_choice_manage action=put_choice (or lbb_workflows_manage action=activate) with experiment, after the user confirmed; it fails with experiment_outdated when the workflow moved since.

Delete an Evals dataset by id, with its items. A later datasets_get or datasets_export of it answers 404, and the next save of its workflow test makes a new dataset. The server reads the dataset first, so the question names it and its item count. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Write graph facts, retract them, or label ranked results. Explicit mode=records forwards a strict records/1 body, with exact IRIs/terms and the original receipt. It requires an existing support-enabled graph; protocol recognition never activates or converts a graph. Record edits that may remove support (set/unset/remove/delete/replace_scope or asserted=false) ask for approval. mode=facts writes triplets/embeddings/properties; mode=retract removes a wrongly-added fact (by edge or by entity) without a full reset; mode=search_feedback stores query/result relevance labels (Feedback grades: 3=ideal/good, 1=partial, 0=bad; include query, search_id when available, target, rank, score). Explicit idempotency_key wins; when omitted, MCP derives a stable content hash so content-identical retries dedupe. Facts mode defaults edge_idempotency to append; pass skip_unchanged for re-runnable backfills. A retract asks the person to approve the links and records it removes first. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.

Manage native schema metadata. Actions: define_ontology (friendly spec with super_types), evolve_ontology (ordered edits including add_super_types), list_starters (the base ontologies crm, documents and work, each with its status on the graph: absent, partial or applied, what applying adds, and conflicts), apply_starter (add what the graph lacks of a starter in one ontology version; a relation the graph has is widened; refused with starter_conflict when the graph holds a term differently; dry_run previews), publish_schema (SHACL activation), suggest_ontology_change (file a change for a person to review instead of applying it; prefer it when the graph's owner reviews ontology changes, and list the result with lbb_inspect action=ontology_suggestions; facts files graph facts for review, which accepting commits after the change, and change may be empty when facts is set), get_rewrite_profile and set_rewrite_profile (the graph's notes and up to 20 worked question-to-SPARQL examples that lbb_query mode=question reads for every question; pass the version you read as expected_version). define, evolve, publish and set_rewrite_profile support dry_run previews. Definition/import here extracts native metadata; it does NOT store the complete RDF/OWL document as queryable graph facts. Use lbb_rdf import for full OWL and lbb_rdf update for additive INSERT DATA revisions; RDF deletions are unsupported. Publish_schema accepts unchanged ontology plus shapes; use define/evolve for native ontology changes. Publication enqueues durable conformance; a preview does not validate the whole graph. An evolve_ontology that removes (remove_entity_type, remove_relation, or narrow_relation with remove_domain or remove_range) and a publish_schema with desired_mode=reject ask the person to approve first; a dry_run does not ask. The server asks the person to approve it through the client (MCP form elicitation) and sends nothing when they decline (approval_declined). A client that cannot show the question gets approval_required and nothing is sent, unless the MCP server's environment sets LBB_MCP_DESTRUCTIVE=allow.