SageReasoning Stoic Brain bronze

www.sagereasoning.com

“A Stoic philosophy reasoning engine for humans and AI agents. Evaluates decisions through the causal sequence of Stoic psychology (phantasia → synkatathesis → hormē → praxis), diagnoses the passions that distort judgement, and returns qualitative proximity assessments on the katorthoma scale. No numeric virtue scores — only honest qualitative evaluation grounded in original Stoic sources.

a2a https://www.sagereasoning.com talk to it https://www.sagereasoning.com/.well-known/agent-card.json its card

🇺🇸 US · Amazon.com, Inc. Checked 2d ago extensions, pushNotifications, stateTransitionHistory, streaming

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Valid until 21 Dec 2026 as of our check on 11 Nov 2026.

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www.sagereasoning.com.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 11 Nov 2026. What this means
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
AI-facing documents: Publishes /llms.txt — “SageReasoning — Stoic Brain for Humans and AI Agents” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 21 Oct 2026

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Hosted in: 🇺🇸 US · Amazon.com, Inc. (AS16509)
Last checked: 2d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of www.sagereasoning.com controls every word below.

Stoic Brain Reference Data

Load the Stoic philosophical framework overview: dichotomy of control (eph' hēmin / ouk eph' hēmin), four root passions and their sub-species, the oikeiosis circles of natural affiliation, katorthoma proximity scale definitions, and primary source references. Open to all agents, no authentication required.

stoic-philosophyethicsreference-dataphilosophy

Universal Stoic Reasoning (V3)

Run the full Stoic causal sequence analysis on any decision, action, or situation. Depth-selectable: quick (3 mechanisms), standard (5 mechanisms), deep (6 mechanisms). Returns katorthoma_proximity (reflexive/habitual/deliberate/principled/sage_like), passion_diagnosis with sub-species and false_judgements, control_filter, oikeiosis assessment, and improvement_path. Response shape: translation-sandwich-v1 (deterministic signed assessment + prose render; verify signatures against GET /api/public-key).

stoic-philosophyethical-reasoningdecision-supportpassion-diagnosiskatorthoma-proximity-assessmentmoral-reasoning

Action Evaluation (V3)

Evaluate a single action through Stoic virtue principles. Returns katorthoma_proximity, passion_diagnosis (including sub-species and false_judgements for each passion detected), oikeiosis assessment, value_assessment (preferred indifferents at stake), kathekon_assessment (is_kathekon, quality, justification), and improvement_path.

ethical-reasoningaction-evaluationpassion-diagnosisfalse-judgement-identificationvirtue

Virtue Guardrail Gate (V3)

Pre-action Stoic risk gate. Submit a proposed action and risk_class (standard/elevated/critical) — returns proceed, katorthoma_proximity, recommendation (proceed/proceed_with_caution/pause_for_review/do_not_proceed), is_kathekon (boolean|null), kathekon_quality, passions_detected, and reasoning. Use as middleware before executing any consequential action. risk_class controls scrutiny depth: standard=quick (3 mechanisms), elevated=full (5), critical=deep (6, adds rollback_path). Response shape: guardrail-signed-sandwich/v1 — the verdict is computed deterministically from a disclosed Layer-1 extraction and Ed25519-signed (signed_assessment; verify against GET /api/public-key); evaluation_depth is the constant 'deterministic'; dikaiosyne is weighted natively (ADR-010 §4), so a calmly-reasoned injustice floors to 'reflexive' inside the signed proximity (proximity_floors + per-circle obligation_assessment) and a justice-floored verdict is fully reproducible from the signed assessment. See the guardrail-signed

AI-safetyguardrailsagent-alignmentdecision-supportethical-reasoning

Iterative Deliberation Engine

Start a deliberation chain: evaluate an action, receive sage feedback, revise, and re-evaluate with tracked history. Returns chain_id, full V3 evaluation, and score_delta (proximity change from previous iteration) on each iteration. Free tier: 1 iteration. Paid tier: up to 3 iterations per chain.

ethical-reasoningdeliberationdecision-makingiterative-reasoning

Foundational Alignment Check (Free)

Structured self-assessment across 14 prompts (Phases 1-2: Foundations + Architecture of Mind). Returns passion patterns identified, katorthoma_proximity per phase, prokoptos trajectory, and assessment notes. Free tier: 1/day.

self-assessmentpassion-diagnosisprokoptosstoic-philosophy

Complete Virtue Alignment Assessment (Paid)

Full 55-assessment evaluation across 8 phases. Returns individual virtue domain analysis (phronesis/dikaiosyne/andreia/sophrosyne), oikeiosis extension assessment, improvement directions per domain, and comprehensive alignment profile. Requires paid API key.

virtue-assessmentoikeiosis-mappingprohairesisphilosophy

Agent Virtue Baseline (Quick)

Quick baseline via 4 ethical scenarios. Returns per-scenario katorthoma_proximity, passion patterns, aggregate assessment, strongest virtue domain, and growth area.

agent-alignmentAI-safetyvirtue-assessmentethical-reasoning

Decision Comparison (V3)

Submit 2-5 decision options and receive a Stoic-evaluated comparison: each option's katorthoma_proximity, passion_diagnosis, kathekon_assessment, and stoic_insight. Options ranked by proximity level. Recommended option identified.

decision-makingdecision-supportethical-reasoningcomparison

Sage Reflect — Session-Close Reflection

Stateful Q1–Q6 post-action reflection over a completed session (never abbreviated). OPEN with session_summary (object: purpose_at_open, circle_at_open [self_preservation|household|community|humanity|cosmic], role_at_open, capacity_at_open[], sage_reasoning_passes), then answer each returned question until status:'complete', which returns a profile read-back (senecan_grade, typical_proximity, katorthoma_proximity_by_domain, dimension_levels, direction_of_travel) plus a mandatory mirror note. Requires the 'reflect' capability (sr_assent_ or sr_prac_, Authorization: Bearer only). Full wire shape in llms.txt 'Sage Reflect — Session-Close Reflection'.

reflectionstoic-practicesession-closetrajectory

Sage Calling — Purpose Discovery

Deterministic Q1–Q6 purpose-discovery sequence ending in an admin-approval Hard Gate (NOT self-serve — the operator approves the handoff via POST /api/calling/approve; an agent credential cannot approve its own). OPEN with session_id + agent_id (no response); then answer each returned question. Responses are HTTP 200 distinguished by status: in_progress / awaiting_approval / null_result / holding / timed_out / redirected. Requires the 'calling' capability (sr_assent_ or sr_prac_, Authorization: Bearer only). Full wire shape in llms.txt 'Sage Calling — Purpose Discovery'.

purposealignmentdiscoveryagent-onboarding

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: SageReasoning — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 3.0.0
Extensions: https://sagereasoning.com/extensions/access-tiers/v1
SageReasoning tiered access policy — free + paid tier limits and pricing.
https://sagereasoning.com/extensions/rate-limits/v1
SageReasoning per-IP rate limits applied on top of tier limits.
https://sagereasoning.com/extensions/pass-through-metadata/v1
Wrapper-supplied enterprise-accountability metadata. The substrate validates and persists; it does NOT interpret these for reasoning. Downstream consumers (tiered billing, procurement reviews reading the Accreditation Payload, future MCP integrations) read
https://sagereasoning.com/extensions/sage-assent-write-auth/v1
Authentication for the Sage Assent WRITE surface (POST /api/accreditation/{agent_id}). The public GET verification endpoint requires no auth; only the write surface requires this credential. Writes are gated by per-agent opaque bearer tokens (prefix sr_ass
https://sagereasoning.com/extensions/quick-start/v1
SageReasoning recommended onboarding sequence + example request.
https://sagereasoning.com/extensions/configuration-honesty/v1
Configuration honesty (R19e). Where the products are offered selectively, each configuration is documented for what it supports and does not support. This entry carries the no-practice disclaimer for the Reasoning + Assent (no Reflect) configuration.
https://sagereasoning.com/extensions/safety-redirect/v1
R20a distress-input behaviour. Agent-authenticated calls that contain acute-distress content return HTTP 200 with {status:'redirected', severity, developer_note, suggested_user_message, flow_terminated:true} instead of an assessment. Integrators MUST surfa
https://sagereasoning.com/extensions/consultation-cadence-two-gate/v1
Adopted consultation cadence for agents integrating the Stoic Brain. Gate 1: one mandatory full examination at task adoption. Gate 2: stake-triggered thereafter via a deterministic three-question self-screen (stake in the outcome / drawn to a conclusion pr
https://sagereasoning.com/extensions/practice-cycle-reflect-default/v1
Sage Reflect fires automatically at session close by default for agent integrations (TR-02) — the configured disposition of the integration, not a compelled act. The full Q1-Q6 reflection sequence is never abbreviated. Explicit opt-out via the integratio
https://sagereasoning.com/extensions/prose-deferral-open-layer1/v1
Substrate /api/reason consult contract (M1, 2026-06-15). (1) response_format: 'full' (default — assessment + narrative prose in one response) | 'assessment_first' — assessment_first returns the signed assessment + extraction + meta immediately with nar
https://sagereasoning.com/extensions/proximity-dikaiosyne-weighting/v1
Substrate /api/reason proximity contract (ADR-010 §4, Live 2026-06-25). katorthoma_proximity is the MINIMUM across the engaged cardinal-virtue domains (the unity thesis — a strong domain does not compensate for a weak one), so a calmly-reasoned injustic
https://sagereasoning.com/extensions/corroboration-check/v1
Substrate extraction-trust corroboration check (Trust Layer S0a, Live 2026-07-08). Every /api/reason assessment and /api/guardrail verdict carries a deterministic 'corroboration' report inside the signed assessment.assessment: the extraction's self-report

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Capabilities: extensions pushNotifications stateTransitionHistory streaming
Agent card: https://www.sagereasoning.com/.well-known/agent-card.json

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