> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mnemom.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Trust Posture

> A named, versioned, cloneable, assignable oversight policy. Mnemom ships three opinionated defaults; orgs use them as-is or clone-and-customize.

A **Trust Posture** is Mnemom's fleet-level oversight policy artifact. It's the named object that decides which sideband detectors fire, at what thresholds, on what cadence, with what severity, with what fan-out. Postures are assigned to teams; the observer reads each team's effective posture at sweep time and runs the corresponding detectors against the team's members.

A posture is a first-class, library-cataloged, versioned object, the same shape as a policy-management object in other security platforms: you assign it to teams, clone it to customize, and roll back when needed.

## The named-object pattern

Three properties matter:

1. **Posture is the entity, not a property on the team.** The posture lives in a library. Teams are *assigned* a posture. The posture outlives the team↔posture relationship — clone it, edit it, A/B-test it, export it, archive it, all without touching any team.

2. **Every mutation creates a new revision.** Postures are versioned. The current revision is what observer reads; older revisions stay queryable. Rollback is forward-only — rolling back to revision `N` creates a new revision whose body equals revision `N`'s. Audit linearity preserved.

3. **Mnemom ships opinionated defaults.** Three platform-scope postures arrive seeded:

   * **Standard** — sensible enterprise defaults (the right starting point).
   * **High-Compliance** — banking-core / regulated industry shape; tighter, faster, louder.
   * **Low-Latency** — real-time agent UX; permissive thresholds, slower cadence.

   Customers either use these as-is or clone-and-customize. There's no "empty config" starting state.

## Why postures are separate from cards

[Trust Posture vs. Cards](/concepts/posture-vs-cards) covers this in depth. The short version:

* **Cards** (Alignment Card, Protection Card) are **agent-scoped runtime treatment**. They answer "what is this agent allowed to do?" and "how do we screen this agent's content for threats?" Read by the gateway at request time.
* **Postures** are **team-scoped policy input**. They answer "across this group of agents, what fleet-level patterns warrant alarm?" Read by the observer at sweep time.

The two artifact types are parallel — they share infrastructure (composer, read-through cache, audit log) but their data planes are independent. A posture never folds into a card; a card never folds into a posture.

## The cascade

Effective posture is composed `Platform → Org → Team`:

| Layer | Source | Notes |
| - | - | - |
| Platform | One of `tp-platform-{standard,high-compliance,low-latency}` | Cascade-closure floor. Every team has at least the platform layer. |
| Org | The org's chosen default (set on `orgs.default_posture_id`) | Optional. NULL ⇒ org doesn't override the platform layer. |
| Team | The team's directly-assigned posture | Optional. NULL ⇒ team inherits org/platform. |

[Strictest-wins per axis](/specifications/trust-posture-schema#composition-rules):

* `enabled` (bool): OR-true wins (any layer enabling fires the detector)
* `cadence_seconds` (number): min wins (shorter = more frequent = stricter)
* `fire_on.*` (number or null): min-among-defined wins; null contributes nothing
* `severity_floor` (enum): min wins (lower floor = more advisories)
* `severity_on_fire` (enum): max wins (higher = louder advisory)
* Pattern booleans (`patterns.outliers`, `cluster_partition`): OR-true wins

Cascade closure for posture guarantees every team has an effective posture; the platform default is the floor.

## Library, editor, and assignment

Three first-class management surfaces:

* **Library** (`/settings/organization/postures`): browse the three Mnemom defaults plus your org's customized postures. Cards display assigned-team count, current revision, last-edited-by, divergence-from-default indicator.
* **Editor** (`/settings/organization/postures/{id}`): three-column composition preview. Your draft, the org floor, the effective composed result. Per-field tightening callouts.
* **Assignment** (on the team detail page): a tree view of `Platform → Org → Team` showing which posture is at each layer and which axis comes from where.

CLI mirror via the `mnemom posture` subcommands (`list`, `show`, `create`, `update`, `clone`, `revisions`, `diff`, `assign`, `unassign`, `preview-compose`, `delete`).

## What postures don't do

Postures are deliberately *not* a place to set per-agent runtime treatment. If you want to:

* Forbid `rm -rf` on a specific agent → that's [Alignment Card](/concepts/alignment-cards) `enforcement.forbidden_tools`.
* Block PII from leaving via an agent's responses → that's [Protection Card](/concepts/protection-card) DLP thresholds.
* Cap autonomous spend → that's Alignment Card `autonomy.max_autonomous_value`.

If you want to:

* Detect when a team's value coherence degrades → posture `sideband.coherence`.
* Detect fault lines forming between agents → posture `sideband.fault_line`.
* Detect fleet outliers — agents drifting from the group's center of mass → posture `sideband.fleet`.

## Audit + compliance

Every posture mutation emits a `governance_audit_log` row with `target_type='posture'` and one of:

* `posture.create`, `posture.put`, `posture.clone`, `posture.delete`
* `team_posture.assign`, `team_posture.unassign`

Versioning + audit + assignment metadata together give compliance reporting a queryable foundation: "What was our coherence detection threshold for the trading-desk team on 2026-03-31?" is one SQL join.

## Further reading

* [Trust Posture vs. Cards](/concepts/posture-vs-cards) — how postures and cards cooperate
* [Mnemom-shipped default postures](/concepts/mnemom-default-postures) — when to choose Standard vs. High-Compliance vs. Low-Latency
* [Posture versioning](/concepts/posture-versioning) — revisions, rollback, diff
* [Trust Posture schema](/specifications/trust-posture-schema) — normative JSONB body
* [Sideband detection](/guides/sideband-detection) — tuning coherence/fault\_line/fleet via posture
* [Posture cloning workflow](/guides/posture-cloning) — clone-and-customize end-to-end
* [Compliance attestation foundation](/guides/compliance-attestation-foundation) — versioned postures as audit evidence


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