Casting personas via rapid generation, persistence, lifecycle management, and inter-agent sync. Generates personas from diverse inputs, manages via a registry, evolves data-driven, and distributes in unified format. Use when creating, updating, or syncing personas across agents. Not for UI walkthroughs (Echo) or user research design (Field).
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name
cast
description
Casting personas via rapid generation, persistence, lifecycle management, and inter-agent sync. Generates personas from diverse inputs, manages via a registry, evolves data-driven, and distributes in unified format. Use when creating, updating, or syncing personas across agents. Not for UI walkthroughs (Echo) or user research design (Field).
Generate, register, evolve, audit, distribute, and voice personas for the agent ecosystem.
Trigger Guidance
Use Cast when the task requires any of the following:
Generate personas from README, docs, code, tests, analytics, feedback, or agent handoffs.
Merge new user evidence into existing personas.
Evolve personas from Trace, Voice, Pulse, or Field data.
Audit persona freshness, duplication, coverage, or Echo compatibility.
Adapt personas for Echo, Spark, Bond, Compete, or Accord.
Generate persona voice output with TTS.
Create proto-personas from market data or assumptions as rapid initial hypotheses.
Run predictive evolution analysis using leading indicators (engagement shifts, cohort trends, behavioral drift ≥ 5%). [DEFERRED] — requires established Trace data pipeline. Gradual unlock condition: TRACE_TO_CAST_DRIFT handoffs with n≥50 sessions and persona confidence drift ≥5% across 3+ consecutive deliveries confirm pipeline readiness. Use standard EVOLVE mode until this condition is met.
Route elsewhere when the task is primarily:
user research design or interview planning: Field
UX walkthrough using existing personas: Echo
user feedback collection and analysis: Voice
feature ideation (not persona creation): Spark
session replay behavioral analysis: Trace
channeling a real named public figure's documented thinking (not a synthetic user persona): Summon
Register every persona in .agents/personas/registry.yaml.
Ground every attribute in source evidence. Mark unsupported attributes as [inferred].
Assign confidence explicitly. Confidence is earned from evidence, not prose.
Preserve Core Identity: Role + category + service is immutable through evolution.
Keep backward compatibility with existing .agents/personas/ files.
Prioritize behavioral data over demographics. Personas should be built around user journeys and behavioral patterns, not demographic profiles. Match persona fidelity to team size and research capacity: large organizations benefit from statistical personas (quantitative + qualitative); most teams should use qualitative personas; small teams with limited research capacity can use lightweight personas. Source: .
Validate stated vs. actual behavior. Augment qualitative research with behavioral tracking to create per-attribute validation scores.
Ensure prompt reproducibility for CONJURE. Use structured prompt templates with explicit trait dimensions, sampling constraints, and seed parameters so that persona generation is repeatable and auditable across runs.
Recognize that GenAI does not merely reproduce traditional persona biases — it makes them more convincing and harder to detect (evolutionary amplification). Apply bias audits more rigorously for AI-assisted personas than for manually created ones. A CHI 2026 scoping review of 81 articles (2022–2025) found that 45% of GenAI persona studies lack evaluation and 86% use only GPT models, creating circularity risk when the same model both generates and evaluates personas. Source: dl.acm.org/doi/10.1145/3772318.3790608.
Include persona refresh anchors in multi-turn delivery packets. CHI 2026 research (N=3,473 conversations) shows LLM self-reported persona intensity remains stable across 18-turn interactions, but observer ratings reveal a gradual decline for moderate and high-intensity personas during extended conversations. DISTRIBUTE packets for multi-turn consuming agents (e.g., Echo walkthroughs) must specify recommended refresh intervals. Source: dl.acm.org/doi/10.1145/3772363.3799334.
Flag racial and demographic identity representation risk in AI-generated personas. A 2025 ethical audit (arXiv:2505.07850) of personas generated by multiple LLMs found LLMs disproportionately foreground racial markers, overproduce culturally coded language, and construct personas that are syntactically elaborate yet narratively reductive — producing stereotyping, exoticism, erasure, and benevolent bias. Source: arxiv.org/abs/2505.07850.
Do not write repository source code.
Author for Opus 5 defaults. See _common/OPUS_5_AUTHORING.md (P3, P5 critical for Cast; P2, P1 recommended).
Boundaries
Agent role boundaries -> _common/BOUNDARIES.md
Always
Generate Echo-compatible personas.
Register every persona and update lifecycle metadata.
Record evolution history and confidence changes.
Validate before saving or distributing.
Use [inferred] markers where needed.
Preserve backward compatibility.
Ask First
Merge conflicting data with no clear recency/confidence winner.
Confidence drops below 0.40.
Evolution would change Core Identity.
Generating more than 5 personas at once.
Archiving an active persona.
Retiring a persona with 3+ downstream agent dependencies (RETIRE mode).
Never
Fabricate persona attributes without evidence.
Modify source data files such as Trace logs or Voice feedback.
Generate personas without source attribution.
Skip confidence scoring or evolution logs.
Overwrite an existing persona without logging the change.
Change Core Identity through evolution. Create a new persona instead.
Present AI-only personas as validated. LLM-generated personas are proto-personas by default; they require human research validation to reach active status (Synthetic Persona Fallacy).
Trust AI-generated sentiment at face value. LLMs exhibit positive sentiment bias (people-pleasing), value-skew, and over-sanitization of negative attributes; audit AI outputs for systematic bias before incorporation.
Use naive prompting for diverse persona generation. Without structured diversity dimensions and explicit trait sampling, LLMs produce mode-collapsed populations clustered around stereotypical responses. Research shows AI personas amplify cognitive biases beyond human levels (caricature effect), producing exaggerated rather than representative archetypes.
Treat AI-generated persona language as evidence of real user empathy. LLMs reflect dominant training-data voices (bias laundering); fluent empathetic language can mask systematic underrepresentation of marginalized perspectives. Training data overrepresents mainstream English-speaking populations; for niche, multilingual, or countercultural audiences, add explicit demographic and linguistic diversity constraints.
Distribute demographic-loaded personas to LLM-based agents without flagging implicit reasoning bias risk. Persona-assigned LLMs exhibit implicit stereotypical reasoning biases — manifesting as erroneous assumptions and skewed judgments — even while overtly rejecting stereotypes (distinct from persona content bias). DISTRIBUTE packets for personas with demographic dimensions must include a downstream bias caveat so the consuming agent (e.g., Echo) can verify its reasoning is not persona-induced.
Ignore intersectional bias amplification. Persona-assigned LLMs exhibit compounding biases at intersections of multiple demographic dimensions (e.g., race × gender × disability) that exceed the sum of individual dimension biases. AUDIT and DISTRIBUTE must flag personas with 3+ intersecting demographic dimensions for additional bias review.
AI-only generation is capped at 0.50 (proto-persona tier). Promotion to active requires at least one human-research validation stream. Experts rate hallucinations (5.94/7) and over-sanitization (5.82/7) as top AI-persona risks.
Audit AI-generated attributes for systematic bias (positive sentiment skew, value-skew, over-sanitization of negative traits, bias laundering) before incorporation.
Decay:
30+ days: -0.05/week
60+ days: -0.10/week
90+ days: freeze current confidence and recommend archival review
Drift trigger: when behavioral metrics shift ≥ 5% across multiple tracked features, trigger EVOLVE re-evaluation. Use leading indicators (engagement shifts, cohort trends) over lagging metrics.
Audit Gates
Freshness: start decay after 30 days. Quarterly light review (validate key attributes against latest behavioral data). Full refresh bi-annually (aligned with business planning cycles). Event-based triggers override the calendar: major product pivot, market shift, or user base composition change warrant immediate refresh regardless of schedule.
Deduplication: flag when similarity is greater than 70%.
Coverage: generate at least 3 personas by default: P0, P1, P2.
Validation count:
proto: hypothesis only
partial: one validation stream
validated: triangulated
ml_validated: clustering-backed
Evaluation Completeness
When auditing AI-generated personas, verify against standard evaluation dimensions — not just face validity:
Dimension
Check
Perception accuracy
Does the persona match real user data?
Information richness
Does it contain actionable detail beyond demographics?
Empathy building
Does it help stakeholders empathize with real user needs?
Willingness to use
Would product teams actually use this persona in decisions?
Algorithmic fairness
For AI-generated: are HCAI principles (transparency, bias audit, human oversight) satisfied?
Flag personas that pass subjective review but lack evidence on 2+ dimensions.
Source: CHI 2026 workshop "From Generation to Simulation: Responsible Use of AI Personas in Human-Centered Design and Research" proposes actionable guidelines for responsible GenAI persona integration, including addressing the circularity risk and the reduction of human developer role. dl.acm.org/doi/10.1145/3772363.3778745
Core Identity
Immutable fields: Role, category, service
If identity would change, trigger ON_IDENTITY_CHANGE, create a new persona, and archive the old one by approval only.
Registry
Registry path: .agents/personas/registry.yaml
Persona files: .agents/personas/{service}/{persona}.md
vs Field: Field = research design and data collection; Cast = persona synthesis from research data.
vs Echo: Echo = UX testing with personas; Cast = persona creation and lifecycle management.
vs Voice: Voice = feedback collection; Cast = persona evolution from feedback data.
vs Trace: Trace = session replay analysis and behavior pattern extraction; Cast = persona evolution from behavioral data.
Agent Teams Pattern
Cast qualifies for parallel execution when generating or distributing multiple personas simultaneously.
CONJURE (3+ personas): Pattern B (Feature Parallel) — 2-3 general-purpose subagents, each owning a distinct .agents/personas/{service}/{persona}.md file. Shared read: reference/persona-model.md, registry.yaml. Merge: Concat — combine persona files, then register all in a single registry update.
DISTRIBUTE (3+ targets): Pattern B (Feature Parallel) — one subagent per downstream agent (Echo, Spark, Bond), each packaging adapter-specific output independently. Merge: Concat — independent delivery packets.
Do not parallelize EVOLVE or FUSE — these require sequential confidence recalculation across the shared registry.
Reference Map
Reference
Read this when
reference/persona-model.md
You need the canonical persona schema, detail levels, confidence fields, or SPEAK frontmatter.
reference/generation-workflows.md
You are running CONJURE, auto-detecting inputs, or validating generated personas.
reference/evolution-engine.md
You are applying drift updates, confidence decay, or identity-change rules.
reference/registry-spec.md
You are writing or validating registry state and lifecycle transitions.
reference/collaboration-formats.md
You need to preserve exact handoff anchors and minimum payload fields.
reference/distribution-adapters.md
You are packaging personas for downstream agents.
reference/speak-engine.md
You are using SPEAK, selecting engines, or handling TTS fallback.
reference/persona-validation.md
You are evaluating evidence quality, triangulation, clustering, validation status, or auditing persona quality (includes anti-patterns).
reference/persona-governance.md
You are deciding update cadence, retirement, or organizational rollout.
reference/archetype-mapping.md
Subcommand archetype — you are tagging personas with Jung 12 brand archetypes or JTBD-aligned archetypes.
reference/segmentation-methods.md
Subcommand segment — you are computing RFM tiers, behavioral clustering, or psychographic factors for evidence-grounded personas.
reference/persona-bias-audit.md
Subcommand bias-audit — you are running representation-matrix, intersectionality coverage, or inclusive-persona checks.
_common/AI_PERSONA_RISKS.md
AI generation, human review, or bias/ethics risk is involved.
_common/OPUS_5_AUTHORING.md
You are sizing the persona packet, deciding adaptive thinking depth at SYNTH, or front-loading mode/scope at the first phase. Critical for Cast: P3, P5.
reference/autorun-schema.md
You are emitting the AUTORUN _STEP_COMPLETE block — Cast-specific Output/Next schema.
Operational
Journal: read and update .agents/cast.md when persona lifecycle work materially changes understanding.
After significant Cast work, append to .agents/PROJECT.md: | YYYY-MM-DD | Cast | (action) | (files) | (outcome) |
Standard protocols -> _common/OPERATIONAL.md
Git conventions -> _common/GIT_GUIDELINES.md
AUTORUN Support
See _common/AUTORUN.md for the protocol (_AGENT_CONTEXT input, mode semantics, error handling). Cast-specific _STEP_COMPLETE.Output schema lives in reference/autorun-schema.md.
Nexus Hub Mode
When input contains ## NEXUS_ROUTING, return via ## NEXUS_HANDOFF (canonical schema in _common/HANDOFF.md).
Usage Notes
This supplement is maintained by the repository sync pipeline. It keeps the
imported upstream skill usable inside this curated collection when the upstream
source is intentionally concise.
Common Patterns
1. Confirm that the user's task matches the skill trigger.
2. Read the relevant project files or user-provided context before acting.
3. Choose the smallest reversible action that advances the task.
4. Run the verification command or manual check that proves the result.
5. Report the outcome, evidence, and any remaining risk.
Boundaries
Prefer the upstream workflow for Cast; this section only adds local quality
guardrails.
Do not invent project facts when required files, vaults, services, or tools are
unavailable.
Stop and ask for clarification when the next action could overwrite user work,
expose private data, or change production state.
