emem

emem is shared memory for AI agents working together in the real world. One agent writes down what it observed. Another agent reads the same bytes, not a summary of them. Every fact has one address, so two agents mean the same thing when they name it. Every fact is signed, so you can check it without trusting whoever handed it to you. Every fact says how it was produced, so you know what it is worth. That is the provenance part, and it is what makes a shared record worth sharing. Reads need no key and no account.

Skills

• What tools exist here, and when to reach for each
  The map of emem's tool surface, and the only tool you need to find the rest.
  introspectL0
• Resolve place to cell64 + band inventory
  Mint the canonical, vendor-neutral address (cell64) for a real-world place: the shared spatial identity every agent resolves to identically, so two models refer to the same ground instead of two descr...
  readL0
• Ask a free-text question about a place
  Single-shot free-text answer about a real-world location, backed by signed satellite/elevation/water/built-up receipts.
  readL0
• Hunter mode, find event hotspots over a region
  Event-discovery sweep: pick an event keyword (algal_bloom, deforestation, flood_extent, wildfire, urban_heat_island, methane_plume, landslide, drought, soil_salinity, crop_stress, water_turbidity, oil...
  readL0
• EUDR Due Diligence Statement, polygon-in, signed Annex II envelope out
  Produce a Due Diligence Statement per Regulation (EU) 2023/1115 for one or more plots.
  readL0
• Standardized Precipitation Index (McKee 1993) drought metric
  Compute the Standardized Precipitation Index (McKee et al.
  readL0
• Burn severity (dNBR, Key & Benson) from pre/post-fire NBR
  Compute the differenced Normalized Burn Ratio (dNBR = NBR_pre − NBR_post; Key & Benson 2006) and map it to the USGS burn-severity classes (unburned / low / moderate-low / moderate-high / high).
  readL0
• Rice-paddy methane (IPCC 2019 Tier 2, Eq 5.1)
  Estimate seasonal CH4 emissions from rice cultivation per IPCC 2019 Refinement Eq 5.
  readL0
• Deforestation alert proxy (NDVI drop + embedding change)
  Composite deforestation-alert score: `alert_score = 0.5·clamp01(ndvi_drop/0.30) + 0.5·clamp01(embedding_change/0.
  readL0
• Sentinel-1 SAR forest-disturbance scout (cloud-penetrating)
  Cloud- and night-independent Sentinel-1 C-band confirmation of forest disturbance.
  readL0
• Clay+Prithvi+Tessera change-consensus ensemble
  Three-encoder change ensemble: compute the cosine change between the two most-recent DISTINCT vintages for each of the Clay, Prithvi, and Tessera embeddings at the cell, then vote each encoder's chang...
  readL0
• Change attribution ledger: why did this place's readout move
  The first runnable surface of the change decomposition Δz = Δ_env + Δ_sensor + Δ_geo + Δ_encoder + ε: a per-term evidence LEDGER for the readout change at a cell, with NO numeric split.
  readL0
• Band raster: a field as a signed derivation
  Return a native-resolution Sentinel-2 window over a bounding box as a FIELD, not a set of points: the pixels become one content-addressed grid artifact (deterministic f32 encoding; fetch the bytes at...
  readL0
• Dereference an emem:raster: field token
  Resolve emem:raster:<aoi_cid>:<band>:<tslot>:<derivation_cid> back to its signed derivation record and the artifact's status.
  readL0
• Band cube: a field over time, as a signed manifest
  Mint an emem:cube: token: a Sentinel-2 field over an AOI ACROSS TIME.
  readL0
• Band composite: a signed cloud-masked median over a window
  Mint a signed, cloud-masked median composite over a date window as a raster-shaped field: the clean, gap-filled texture a world model actually drapes, rather than one cloudy scene.
  readL0
• Dereference an emem:cube: field-over-time token
  Resolve emem:cube:<aoi_cid>:<band>:<tslot_lo>..<tslot_hi>:<derivation_cid> back to its signed cube record and the ordered member emem:raster: tokens.
  readL0
• Raster bundle: bind N field tokens into one citeable manifest
  Mint an emem:rasterset: token: a signed manifest binding 2..
  readL0
• Dereference an emem:rasterset: bundle token
  Resolve emem:rasterset:<bundle_cid>:<derivation_cid> back to its signed manifest and verify it.
  readL0
• Terrain triad, slope + ruggedness + topographic position from DEM
  Compute three standard DEM terrain indices from one 3×3 Copernicus-DEM (copdem30m.
  readL0
• Region similarity, cosine of two regions' mean GeoTessera embeddings
  Answer 'how alike are these two places?' Mean-pool the 128-D GeoTessera embedding across each region's cells to get a centroid, then return the cosine similarity in [-1,1] (+1 = identical landscape, 0...
  readL0
• Embedding centroid, mean-pooled GeoTessera vector for a region
  Mean-pool the 128-D GeoTessera embedding over a region's cells: centroid = (1/N) Σ v_i, plus the L2-normalised centroid and a content-addressed centroid_cid.
  readL0
• Embedding diversity, landscape heterogeneity over a region
  Quantify how varied a region's landscape is: diversity = (1/(N(N-1))) Σ_{i<j} (1 − cosine(v_i, v_j)), the mean pairwise cosine distance over the region's GeoTessera embeddings.
  readL0
• Neighbourhood consistency / spatial outlier (GeoTessera vs 8 neighbours)
  Score how much a cell looks like its surroundings: consistency = (1/8) Σ cosine(centre, neighbour_i) over the 8 immediate cell64 neighbours, plus outlier_score = 1 − consistency.
  readL0
• Read the place's state vector (single encoder OR full 1792-D cube)
  Get one dense numeric fingerprint that summarises everything known about a place, ready to feed into similarity search, a classifier, or clustering.
  readL0
• Multi-encoder state at one cell (foundation fan-out)
  Get the place's fingerprint from several AI models at once (`geotessera`, `clay_v1`, `prithvi_eo2`, `galileo`) in one call, returned as a per-model map.
  readL0
• Between-tslot state vector delta (residual + cosine)
  Vector delta between the same cell at two tslots: returns the per-element residual, its L2 norm (scalar change-magnitude), the cosine between the two source vectors (orientation drift), and both sourc...
  readL0
• Compose a memory_token citation handle
  Mint a citation handle, `emem:fact:<cell64>:<fact_cid>` (or `:<state_cid>`), that any agent or LLM resolves to the byte-identical signed object.
  readL0
• Dereference a memory_token in one round-trip
  Parse a `emem:fact:<cell64>:<fact_cid>` citation handle and return the reading it cites.
  readL0
• Check a value against the fact it cites, before you publish it
  Grade a value you are about to emit against the signed fact your citation points at. Returns `matches` and, when it does not, the `drift` between what you were about to say and what emem holds.
  readL0
• Register your own derivation over emem facts
  Register a value YOU computed from facts this responder holds, and get back a citeable `emem:fact:` token whose lineage terminates in emem-signed measurements.
  writeL0
• List one attester's registered derivations
  List the derivations registered by one ed25519 key, optionally filtered to a cell (and then a band).
  readL0
• Compose a signed multi-fact memory bundle
  Compose N (cell, band, tslot?) triples into ONE signed envelope.
  readL0
• Dereference a memory_bundle token
  Parse a `emem:bundle:<bundle_cid>` token and return the signed bundle envelope: every citation (cell, band, resolved_tslot, fact_cid, memory_token), the receipt, the responder pubkey, and the deduped...
  readL0
• Mint or get a canonical object identity
  Give a real-world object (a bridge, a farm plot, a river, a named place) a single, shared, content-addressed identity that any agent resolves the same way.
  readL0
• Resolve a phrase (or emem:entity: token) to a canonical object
  Converge a fuzzy phrasing onto the canonical object other agents already minted, so everyone co-refers to the same identity instead of re-minting divergent ones. Pass `text` (e.g.
  readL0
• Attest that a phrasing/id denotes an existing object
  Record a signed equivalence: bind an alternate label or a stable external id (GERS / OSM / Wikidata) to an existing canonical object so future `emem_entity_resolve` calls on that phrasing converge to...
  writeL0
• memory_view, read file or directory listing
  Read the contents of a memory file at `/memories/<path>` or list a directory when the path ends with `/`. Optional `view_range: [start, end]` slices a 1-indexed inclusive line range out of the file.
  readL0
• memory_create, write a memory file (overwrite if exists)
  Write a memory file at `/memories/<path>` with the supplied `file_text`. Overwrites if the file exists AND your key owns the path; a write over someone else's file is refused, not merged.
  writeL0
• memory_str_replace, exact-string replacement in a memory file
  Replace `old_str` with `new_str` in the named memory file. Fails (no partial write) when `old_str` is absent or matches more than once. Writes a new content-addressed `file_cid` and signs the receipt.
  writeL0
• memory_insert, insert at a given line
  Insert `new_str` after the given 1-indexed line in the named memory file. `insert_line: 0` inserts at the top. Writes a new `file_cid` and signs the receipt.
  writeL0
• memory_delete, remove a memory file or directory
  Delete a memory file at `/memories/<path>`. When the path ends with `/`, every file beneath the directory is removed.
  writeL0
• memory_supersede, mark your own note replaced by a later one
  Point one of your notes at the note that replaces it.
  writeL0
• memory_rename, move a memory file
  Move (rename) a memory file from `old_path` to `new_path`. Both paths must stay under `/memories/`; `new_path` must not already exist.
  writeL0
• memory_list_by_kind, typed enumeration of memory files
  List memory files by their typed `kind` (episodic | semantic | procedural | resource). Optional path prefix narrows the scan; results are sorted by signed_at descending.
  readL0
• emem_memory_search, semantic search over /memories/* files
  Semantic search over /memories/* file contents using BGE-base-en-v1.5 (768-D, L2-normalised) backed by a Lance partition (`memory_text_index_d768.lance`).
  readL0
• Signed snapshot of corpus liveness
  Signed snapshot of corpus liveness: distinct_cells, distinct_bands, facts_scanned, top per-band counts, manifest CIDs. Same payload that backs /v1/stream's corpus.state tick (signed).
  readL0
• Hand-verified eval items for agent grading
  Hand-verified evaluation items for grading an agent against the responder. Returns {items[], grader_url}. Submit answers (cell64 or fact_cid per item) to POST /v1/benchmark/grade for per-item scores.
  readL0
• Recall facts at a cell (auto-materializes on miss)
  Read the signed facts at a canonical address (cell64); auto-materializes on a miss for any band with a registered materializer.
  readL0
• Recall facts across a place's polygon
  Recall facts across every cell inside a place's polygon (single signed envelope). Closes the place-name-drift gap for wide features (parks, lakes, regions).
  readL0
• Per-field agricultural boundaries (Fields of The World)
  Per-field agricultural-boundary polygons from the Fields of The World global product (~3.17B fields, 241 countries, 10 m resolution, CC-BY-4.0).
  readL0
• Aggregate facts over a region
  Query facts over a region (single cell or list of cells), optionally aggregated per band.
  readL0
• Compare two cells (cosine + scalar deltas)
  Compare two cells: cosine similarity over shared vector bands + per-band scalar deltas.
  readL0
• Compare two bands at one cell
  Compare two bands at the same cell. Scalar pair → metric=delta, value=b-a. Vector pair (equal dim) → metric=cosine + per-dim delta. Returns a signed receipt naming both source fact CIDs.
  readL0
• k-NN over the corpus by embedding
  k-NN over the corpus by cell embedding or inline vector. Returns `neighbours` ordered nearest-first, each with `cell64`, `score` and the `band` scanned, plus a signed receipt over the vectors read.
  readL0
• Time series for one (cell, band)
  Time series for one (cell, band) over an inclusive [start, end] tslot window. Returns only what's already attested; it does NOT trigger materialization. For historical backfill use `emem_backfill`.
  readL0
• Signed delta between two tslots
  Compute a DerivativeFact (delta) between a band's values at two tslots. Memory algebra: the `diff` operation (https://emem.dev/docs/model.html).
  readL0
• Compare a band at the same day-of-year across years
  Compare a band at the SAME day-of-year across several years, the honest way to measure year-over-year change on a seasonal band.
  readL0
• Scan for multi-attester disagreement
  Surface where the corpus DISAGREES with itself (algebra: competing evidence).
  readL0
• Recall temporal knowledge-graph edges
  Read temporal knowledge-graph edges (subj --pred--> obj, valid over [valid_from, valid_to)), bi-temporally filtered, in EITHER direction.
  readL0
• Resolve a fact by content-address (CID)
  Fetch a fact by its content-address (CID). Returns the full signed Primary or Absence fact, the same body served by REST `/v1/facts/{cid}`.
  readL0
• Materialize historical facts in a window
  Materialize and sign every per-tslot fact for one (cell, band) inside a [start_unix, end_unix] window. Returns a signed list of (tslot, fact_cid, status) for each step.
  readL0
• 2-D heat-equation forecast (urban LST evolution)
  Forward-step 2-D explicit finite-difference solver for the heat equation ∂u/∂t = α∇²u over a 3×3 cell stencil centred on `cell`. Reads `modis.
  readL0
• 1-D shallow-water swell propagation to coast
  Forward-step 1-D explicit finite-difference solver for the shallow-water wave equation ∂²u/∂t² = c²∂²u/∂x² with c² = g·h, where depth h comes from `gmrt.
  readL0
• Constrained JEPA-pattern next-month NDVI predictor
  Predict next-month NDVI at a cell using a constrained JEPA-pattern AR(2) seasonal predictor. Reads up to 24 past months of `indices.
  readL0
• Learned multi-band-scalar dynamics head (jepa_temporal_predictor@2)
  Predict the next-step value of 4 environmental scalars at a cell (`indices.ndvi`, `modis.lst_day_8day`, `modis.lst_night_8day`, `cams.pm25`) using a small learned dynamics MLP.
  readL0
• Verify a structured claim against a cell
  Verify a structured claim against a cell's facts. Returns verdict + evidence CIDs + signed receipt.
  verifyL1
• Active band ontology
  Active band ontology (offsets, dims, tempo, privacy).
  introspectL0
• Active function registry
  Active function registry (derivation recipes).
  introspectL0
• Active source-connector registry
  Active source-connector registry (URL templates, providers, licenses).
  introspectL0
• Active CDDL/JSON schema bundle
  Active CDDL/JSON schema bundle by CID.
  introspectL0
• Stable error code catalog
  Stable error code catalog.
  introspectL0
• Active manifest CIDs
  Active manifest CIDs (bands / functions / sources / schema).
  introspectL0
• Cached upstream capability snapshot
  Live capability snapshot of the responder's GPU sidecar, extensions[] (e.g. gpu, clay-v1.5, prithvi-eo2), cuda_available, models_loaded[], healthy, last_polled_unix_s.
  introspectL0
• Active grid encoding
  Active grid encoding: cell64 ground resolution, lat/lng axis sizes, DGGS lineage.
  introspectL0
• Enumerate the cell64s in a bounding box, paged
  Enumerate every cell64 whose centre falls in a bounding box, paged, in stable row-major order (north row first, then west column first).
  introspectL0
• Per-band live status & history bounds
  Per-band live status, what data is alive AND auto-materializable, with history bounds, tempo cadence, and the responder pubkey that signs the band.
  introspectL0
• Auto-fetch registry (per-band materializers)
  Auto-fetch registry: which bands the responder will materialize on a recall miss, the upstream provider, license, value shape, and history bounds.
  introspectL0
• Per-band temporal coverage catalog
  Temporal catalog: for every materializable band the upstream-of-record window the data genuinely covers, the temporal `kind` (static | annual_snapshot | annual_stack | time_series | now_only | per_rel...
  introspectL0
• Composition recipes (algorithms)
  Content-addressed dictionary of composition recipes, formulas that fuse attested band facts (and embeddings) into derived scores, classifications, and similarity metrics.
  introspectL0
• One-algorithm drill-down (formula + inputs + citation)
  Per-key drill-down on a single composition recipe, full body (kind, inputs, formula, output, citation, references) for ONE algorithm key. Companion to `emem_algorithms` (which is the catalog).
  introspectL0
• Topic-grouped band + algorithm registry
  Topic-grouped registry of every band and algorithm at this responder, plus visual surfaces and the `declared_but_no_materializer_at_this_responder` block (cube slots reserved without a live connector).
  introspectL0
• Coverage map (SVG image)
  Live SVG render of the responder's corpus density, returned as a proper MCP EmbeddedResource content block (image/svg+xml), multimodal MCP agents can render it natively.
  introspectL0
• Sentinel-2 true-colour thumbnail (PNG)
  True-colour Sentinel-2 L2A RGB thumbnail centred on a cell. PNG returned as a native MCP ImageContent block (mimeType image/png).
  readL0
• Cell polygon as GeoJSON
  Cell polygon as a native MCP EmbeddedResource (mimeType application/geo+json).
  readL0
• Bulk recall across up to 256 cells
  Recall facts across a list of up to 256 cell64 strings in one round-trip. Server fans out per-cell recalls in parallel and returns them under `by_cell.<cell64>`.
  readL0
• Coherent elevation across Cop-DEM + GMRT + WorldCover
  One-shot elevation answer that fuses Cop-DEM 30 m (land), GMRT (ocean topobathy), and ESA WorldCover (water mask) into a single signed scalar at a place or coordinate.
  readL0
• Satellite / sensor lineage per band
  Per-band satellite-and-sensor fleet inventory, names the upstream platform (e.g.
  introspectL0
• Substrate profile registry
  The written admission contract per contributor class (satellite archive, operator constellation, telescope, microscope, CCTV, mobile, drone, robot, industrial machine, fixed sensor): which admission r...
  introspectL0
• Verify a device's OS execution trace
  Stateless verification of an emem.os_trace.
  verifyL1
• Plan a temporal recall recipe for a cell
  Turn a time-shaped question into a ready-to-run recall plan: it figures out WHICH bands to pull at WHICH past time windows (e.g.
  planL0
• Server-side ed25519 receipt verifier
  Verify a signed receipt envelope server-side: rebuilds the canonical preimage under the rule the receipt's OWN `preimage_version` names (v2, current: tagged length-prefixed segments plus a segment bin...
  verifyL1
• Check whether the citations in a draft actually verify
  Run emem-guard's policy pipeline over text you are about to send, against this responder's corpus.
  verifyL1
• The procedure for running your own verdict server
  Returns the full emem-guard self-host skill as markdown, plus the exact build, test and run commands.
  introspectL0
• Multi-band snapshot at a place
  One-shot recall of the signed facts at a place's cell64 (or lat/lng); each band carries a citeable fact_cid. Defaults to emem's standard at-a-glance band set; pass `band` / `bands` to override.
  readL0
• NDVI at a place (one-shot, polygon-aware)
  Recall the signed Sentinel-2 NDVI fact (indices.ndvi, 10 m native) at a place's canonical cell64, attesting it into the shared memory on a miss.
  readL0
• Air-quality snapshot (CAMS PM2.5 / NO2 / O3)
  Recall the signed Copernicus CAMS air-quality facts (PM2.5 + NO2 + O3) at a place's cell64, attesting on a miss. Composes locate → recall → aggregate; each band carries a citeable fact_cid.
  readL0
• Land surface temperature (MODIS day + night)
  Recall the signed MODIS land surface temperature facts (day-8day + night-8day composites, 1 km native) at a place's cell64, attesting on a miss; each carries a citeable fact_cid.
  readL0
• Soil profile (SoilGrids 0–30 cm: SOC, pH, texture)
  Recall the signed SoilGrids 250 m profile at a place's cell64 (SOC, pH, clay/sand/silt fractions, bulk density, nitrogen, all at 0–30 cm depth), attesting on a miss; each band carries a citeable fac...
  readL0
• Surface water (JRC GSW recurrence + S1 backscatter)
  Recall the signed surface-water facts at a place's cell64: JRC Global Surface Water recurrence (1984–2021) + Sentinel-1 SAR backscatter (current), attested on a miss and citeable by fact_cid.
  readL0
• Forest signals (Hansen GFC + ESA WorldCover)
  Recall the signed forest facts at a place's cell64: Hansen Global Forest Change (tree cover 2000 baseline + year-of-loss) + ESA WorldCover 2021 land class, attested on a miss; each carries a citeable...
  readL0
• Current weather snapshot (temperature, cloud, precip, wind)
  Recall the signed met.no/CAMS weather facts at a place's cell64 (2 m temperature + total cloud cover + precipitation + 10 m wind speed), attesting on a miss; each value carries a citeable fact_cid.
  readL0
• Intent-routed planner
  Say what you want in one typed object and get the answer, without choosing a primitive.
  planL0
• Transparency log signed tree head
  Fetch the responder-signed tree head (STH) over the whole append-only attestation log: {tree_size, root_b32, signed_at, responder_pubkey_b32, signature_b32}.
  verifyL1
• Transparency log inclusion proof
  Return an RFC 6962 inclusion (audit) proof that a log entry is committed under the current signed tree head. Verify offline: the audit path re-derives the STH root from the entry's leaf hash.
  verifyL1
• Transparency log consistency proof
  Return an RFC 6962 consistency proof that the tree of size `first` is an append-only prefix of size `second` (defaults to the current size).
  verifyL1
• Transparency log witness co-signatures
  List witness co-signatures recorded for tree heads, independent parties that counter-signed a (tree_size, root) claim under their own ed25519 key.
  verifyL1
• Compose a prose answer over signed facts (LLM, labelled)
  The opt-in reasoning tier: grounds your question through emem_ask (deterministic, signed), then has the responder's local model compose a prose answer over that envelope.
  planL0
• Live street perception at a place
  Counts per object class at a cell right now, from a retained camera clip whose sha256 is committed in a signed receipt. Answers what orbit cannot: a satellite revisits in days.
  readrestdirect_sensor
• Painted postcard of a place
  A place painted from its own camera clip, one motif per object counted, with the cell, the count and the clip hash inside the file. Unobserved and empty are painted differently.
  readrestdirect_sensor
• Proceed or wait, for something that has to move
  Proceed-or-wait over what a street camera sees, for something that has to move. Returns the clip it reasoned from and its age. Undecidable returns wait. Not a safety system.
  readrestmodel_output

How to call

https://emem.dev/a2a/tasks

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