hermes-agent/plugins/memory/honcho

Honcho Memory Provider

AI-native cross-session user modeling with multi-pass dialectic reasoning, session summaries, bidirectional peer tools, and persistent conclusions.

Honcho docs: https://docs.honcho.dev/v3/guides/integrations/hermes

Requirements

• pip install honcho-ai
• Honcho API key from app.honcho.dev, or a self-hosted instance

Setup

hermes honcho setup    # full interactive wizard (cloud or local)
hermes memory setup    # generic picker, also works

Or manually:

hermes config set memory.provider honcho
echo "HONCHO_API_KEY=***" >> ~/.hermes/.env

Architecture Overview

Two-Layer Context Injection

Context is injected into the user message at API-call time (not the system prompt) to preserve prompt caching. Only a static mode header goes in the system prompt. The injected block is wrapped in <memory-context> fences with a system note clarifying it's background data, not new user input.

Two independent layers, each on its own cadence:

Layer 1 — Base context (refreshed every contextCadence turns):

1. SESSION SUMMARY — from session.context(summary=True), placed first
2. User Representation — Honcho's evolving model of the user
3. User Peer Card — key facts snapshot
4. AI Self-Representation — Honcho's model of the AI peer
5. AI Identity Card — AI peer facts

Layer 2 — Dialectic supplement (fired every dialecticCadence turns): Multi-pass .chat() reasoning about the user, appended after base context.

Both layers are joined, then truncated to fit contextTokens budget via _truncate_to_budget (tokens × 4 chars, word-boundary safe).

Cold Start vs Warm Session Prompts

Dialectic pass 0 automatically selects its prompt based on session state:

• Cold (no base context cached): "Who is this person? What are their preferences, goals, and working style? Focus on facts that would help an AI assistant be immediately useful."
• Warm (base context exists): "Given what's been discussed in this session so far, what context about this user is most relevant to the current conversation? Prioritize active context over biographical facts."

Not configurable — determined automatically.

Dialectic Depth (Multi-Pass Reasoning)

dialecticDepth (1–3, clamped) controls how many .chat() calls fire per dialectic cycle:

Depth	Passes	Behavior
1	single .chat()	Base query only (cold or warm prompt)
2	audit + synthesis	Pass 0 result is self-audited; pass 1 does targeted synthesis. Conditional bail-out if pass 0 returns strong signal (>300 chars or structured with bullets/sections >100 chars)
3	audit + synthesis + reconciliation	Pass 2 reconciles contradictions across prior passes into a final synthesis

Proportional Reasoning Levels

When dialecticDepthLevels is not set, each pass uses a proportional level relative to dialecticReasoningLevel (the "base"):

Depth	Pass levels
1	[base]
2	[minimal, base]
3	[minimal, base, low]

Override with dialecticDepthLevels: an explicit array of reasoning level strings per pass.

Three Orthogonal Dialectic Knobs

Knob	Controls	Type
dialecticCadence	How often — minimum turns between dialectic firings	int
dialecticDepth	How many — passes per firing (1–3)	int
dialecticReasoningLevel	How hard — reasoning ceiling per .chat() call	string

Input Sanitization

run_conversation strips leaked <memory-context> blocks from user input before processing. When saveMessages persists a turn that included injected context, the block can reappear in subsequent turns via message history. The sanitizer removes <memory-context> blocks plus associated system notes.

Tools

Five bidirectional tools. All accept an optional peer parameter ("user" or "ai", default "user").

Tool	LLM call?	Description
honcho_profile	No	Peer card — key facts snapshot
honcho_search	No	Semantic search over stored context (800 tok default, 2000 max)
honcho_context	No	Full session context: summary, representation, card, messages
honcho_reasoning	Yes	LLM-synthesized answer via dialectic .chat()
honcho_conclude	No	Write a persistent fact/conclusion about the user

Tool visibility depends on recallMode: hidden in context mode, always present in tools and hybrid.

Config Resolution

Config is read from the first file that exists:

Priority	Path	Scope
1	$HERMES_HOME/honcho.json	Profile-local (isolated Hermes instances)
2	~/.hermes/honcho.json	Default profile (shared host blocks)
3	~/.honcho/config.json	Global (cross-app interop)

Host key is derived from the active Hermes profile: hermes (default) or hermes.<profile>.

For every key, resolution order is: host block > root > env var > default.

Full Configuration Reference

Identity & Connection

Key	Type	Default	Description
apiKey	string	—	API key. Falls back to HONCHO_API_KEY env var
baseUrl	string	—	Base URL for self-hosted Honcho. Local URLs auto-skip API key auth
environment	string	"production"	SDK environment mapping
enabled	bool	auto	Master toggle. Auto-enables when apiKey or baseUrl present
workspace	string	host key	Honcho workspace ID. Shared environment — all profiles in the same workspace can see the same user identity and related memories
peerName	string	—	User peer identity
aiPeer	string	host key	AI peer identity

Memory & Recall

Key	Type	Default	Description
recallMode	string	"hybrid"	"hybrid" (auto-inject + tools), "context" (auto-inject only, tools hidden), "tools" (tools only, no injection). Legacy "auto" → "hybrid"
observationMode	string	"directional"	Preset: "directional" (all on) or "unified" (shared pool). Use observation object for granular control
observation	object	—	Per-peer observation config (see Observation section)

Write Behavior

Key	Type	Default	Description
writeFrequency	string/int	"async"	"async" (background), "turn" (sync per turn), "session" (batch on end), or integer N (every N turns)
saveMessages	bool	true	Persist messages to Honcho API

Session Resolution

Key	Type	Default	Description
sessionStrategy	string	"per-directory"	"per-directory", "per-session", "per-repo" (git root), "global"
sessionPeerPrefix	bool	false	Prepend peer name to session keys
sessions	object	{}	Manual directory-to-session-name mappings

Session Name Resolution

The Honcho session name determines which conversation bucket memory lands in. Resolution follows a priority chain — first match wins:

Priority	Source	Example session name
1	Manual map (sessions config)	"myproject-main"
2	/title command (mid-session rename)	"refactor-auth"
3	Gateway session key (Telegram, Discord, etc.)	"agent-main-telegram-dm-8439114563"
4	per-session strategy	Hermes session ID (20260415_a3f2b1)
5	per-repo strategy	Git root directory name (hermes-agent)
6	per-directory strategy	Current directory basename (src)
7	global strategy	Workspace name (hermes)

Gateway platforms always resolve via priority 3 (per-chat isolation) regardless of sessionStrategy. The strategy setting only affects CLI sessions.

If sessionPeerPrefix is true, the peer name is prepended: eri-hermes-agent.

What each strategy produces

• per-directory — basename of $PWD. Opening hermes in ~/code/myapp and ~/code/other gives two separate sessions. Same directory = same session across runs.
• per-repo — git root directory name. All subdirectories within a repo share one session. Falls back to per-directory if not inside a git repo.
• per-session — Hermes session ID (timestamp + hex). Every hermes invocation starts a fresh Honcho session. Falls back to per-directory if no session ID is available.
• global — workspace name. One session for everything. Memory accumulates across all directories and runs.

Multi-Profile Pattern

Multiple Hermes profiles can share one workspace while maintaining separate AI identities. Config resolution is host block > root > env var > default — host blocks inherit from root, so shared settings only need to be declared once:

{
  "apiKey": "***",
  "workspace": "hermes",
  "peerName": "yourname",
  "hosts": {
    "hermes": {
      "aiPeer": "hermes",
      "recallMode": "hybrid",
      "sessionStrategy": "per-directory"
    },
    "hermes.coder": {
      "aiPeer": "coder",
      "recallMode": "tools",
      "sessionStrategy": "per-repo"
    }
  }
}

Both profiles see the same user (yourname) in the same shared environment (hermes), but each AI peer builds its own observations, conclusions, and behavior patterns. The coder's memory stays code-oriented; the main agent's stays broad.

Host key is derived from the active Hermes profile: hermes (default) or hermes.<profile> (e.g. hermes -p coder → host key hermes.coder).

Dialectic & Reasoning

Key	Type	Default	Description
dialecticDepth	int	1	Passes per dialectic cycle (1–3, clamped). 1=single query, 2=audit+synthesis, 3=audit+synthesis+reconciliation
dialecticDepthLevels	array	—	Optional array of reasoning level strings per pass. Overrides proportional defaults. Example: ["minimal", "low", "medium"]
dialecticReasoningLevel	string	"low"	Base reasoning level for .chat(): "minimal", "low", "medium", "high", "max"
dialecticDynamic	bool	true	When true, model can override reasoning level per-call via honcho_reasoning tool. When false, always uses dialecticReasoningLevel
dialecticMaxChars	int	600	Max chars of dialectic result injected into system prompt
dialecticMaxInputChars	int	10000	Max chars for dialectic query input to .chat(). Honcho cloud limit: 10k

Token Budgets

Key	Type	Default	Description
contextTokens	int	SDK default	Token budget for context() API calls. Also gates prefetch truncation (tokens × 4 chars)
messageMaxChars	int	25000	Max chars per message sent via add_messages(). Exceeding this triggers chunking with [continued] markers. Honcho cloud limit: 25k

Cadence (Cost Control)

Key	Type	Default	Description
contextCadence	int	1	Minimum turns between base context refreshes (session summary + representation + card)
dialecticCadence	int	1	Minimum turns between dialectic .chat() firings
injectionFrequency	string	"every-turn"	"every-turn" or "first-turn" (inject context on the first user message only, skip from turn 2 onward)
reasoningLevelCap	string	—	Hard cap on reasoning level: "minimal", "low", "medium", "high"

Observation (Granular)

Maps 1:1 to Honcho's per-peer SessionPeerConfig. When present, overrides observationMode preset.

"observation": {
  "user": { "observeMe": true, "observeOthers": true },
  "ai":   { "observeMe": true, "observeOthers": true }
}

Field	Default	Description
user.observeMe	true	User peer self-observation (Honcho builds user representation)
user.observeOthers	true	User peer observes AI messages
ai.observeMe	true	AI peer self-observation (Honcho builds AI representation)
ai.observeOthers	true	AI peer observes user messages (enables cross-peer dialectic)

Presets:

• "directional" (default): all four true
• "unified": user observeMe=true, AI observeOthers=true, rest false

Hardcoded Limits

Limit	Value
Search tool max tokens	2000 (hard cap), 800 (default)
Peer card fetch tokens	200

Environment Variables

Variable	Fallback for
HONCHO_API_KEY	apiKey
HONCHO_BASE_URL	baseUrl
HONCHO_ENVIRONMENT	environment
HERMES_HONCHO_HOST	Host key override

CLI Commands

Command	Description
hermes honcho setup	Full interactive setup wizard
hermes honcho status	Show resolved config for active profile
hermes honcho enable / disable	Toggle Honcho for active profile
hermes honcho mode <mode>	Change recall or observation mode
hermes honcho peer --user <name>	Update user peer name
hermes honcho peer --ai <name>	Update AI peer name
hermes honcho tokens --context <N>	Set context token budget
hermes honcho tokens --dialectic <N>	Set dialectic max chars
hermes honcho map <name>	Map current directory to a session name
hermes honcho sync	Create host blocks for all Hermes profiles

Example Config

{
  "apiKey": "***",
  "workspace": "hermes",
  "peerName": "username",
  "contextCadence": 2,
  "dialecticCadence": 3,
  "dialecticDepth": 2,
  "hosts": {
    "hermes": {
      "enabled": true,
      "aiPeer": "hermes",
      "recallMode": "hybrid",
      "observation": {
        "user": { "observeMe": true, "observeOthers": true },
        "ai": { "observeMe": true, "observeOthers": true }
      },
      "writeFrequency": "async",
      "sessionStrategy": "per-directory",
      "dialecticReasoningLevel": "low",
      "dialecticDepth": 2,
      "dialecticMaxChars": 600,
      "saveMessages": true
    },
    "hermes.coder": {
      "enabled": true,
      "aiPeer": "coder",
      "sessionStrategy": "per-repo",
      "dialecticDepth": 1,
      "dialecticDepthLevels": ["low"],
      "observation": {
        "user": { "observeMe": true, "observeOthers": false },
        "ai": { "observeMe": true, "observeOthers": true }
      }
    }
  },
  "sessions": {
    "/home/user/myproject": "myproject-main"
  }
}