Shared Context

Context

Solves: shaping what the agent knows before it starts, and seeing where that knowledge came from.

Emerging — seen across multiple products; the shape is still settling.

watching →emerging →established →contested →fading 60 sightings since Jun 2026
Ask an assistant about this pattern Ask ChatGPT ↗Ask Claude ↗

Context is what the agent is working from: the files, links, and notes in view. The person decides what is in scope, sees where each piece came from, and can change it. Context is design material, not plumbing.

When to Use It

  • What the agent knows decides the quality and cost of its work
  • Humans should shape what is in scope before a run
  • Context sources need visible provenance

When Not To

  • Context is fixed and tiny; showing it is noise
  • You would expose sensitive material only to display it
  • Humans cannot act on what they see; visibility without agency frustrates

Three views

The exchange between the human, the agent and the system the agent acts on; who holds each part of it; and the component that implements it.

01 · the interaction
human agent system files · search · memory hands over context: files, docs, instructions pulls more from search, memory and the repo returns what it found, and how stale it is shows what it is working from and what it left out adds, removes or pins a source
02 · who holds what
human interface agent Surface: Where the exchange appears — inline, panel, or notification 01 Surface Trigger: What starts it — the agent proposes, or the human initiates 02 Trigger Decision: The person decides: accept, redirect, or stop 03 Decision Record: What persists afterward — receipt, log, or memory entry 04 Record
human interface agent Surface: Where the exchange appears — inline, panel, or notification 01 Surface Trigger: What starts it — the agent proposes, or the human initiates 02 Trigger Decision: The person decides: accept, redirect, or stop 03 Decision Record: What persists afterward — receipt, log, or memory entry 04 Record
  1. 01 Surface Where the exchange appears — inline, panel, or notification
  2. 02 Trigger What starts it — the agent proposes, or the human initiates
  3. 03 Decision The person decides: accept, redirect, or stop
  4. 04 Record What persists afterward — receipt, log, or memory entry

generic anatomy — parts specialize as sightings are mapped

03 · the component

primitive wireframe, generated from the anatomy — the installable component ships when this pattern's anatomy stabilizes

Field Notes

OCT 12 · Paper · via arXiv Confidence SignalingContextObservability

257 users split in two based on whether they saw the agent as human

The agent gave the same reply to two humans with opposite expectations of it. One found it trustworthy, one found it opaque. That is a reply-strategy problem, not a framing problem.

OCT 8 · Paper · via arXiv ContextInterruptionProgress

Ream gives agents and researchers a shared view of each other's work

Both sides watched each other work, and both adjusted. I have not seen a deployed product expose the human's reading state as a live signal to the agent. That is the gap this study names.

OCT 3 · Paper · via arXiv Agent IdentityContextObservability

Persistent agents slip out of their assigned persona mid-run

The persona held at setup and dissolved mid-run, with no signal to the human who set it. Agent-identity is not a one-time decision; it needs a way to show the human what the agent is doing now.

OCT 2 · Paper · via arXiv Agent IdentityContext

A field experiment shows how agent persona shapes child compliance

The framing did more work than the face. If your agent speaks to children and you are choosing between a character and a better script, this study says write the script first.

SEP 29 · Paper · via arXiv ContextMemoryRecovery

457 diary entries show what breaks when a chat assistant forgets you

The human had no view into what the assistant stored about them. That gap is the whole failure. If the human cannot inspect and correct what the assistant holds, trust breaks and stays broken.

SEP 21 · Paper · via arXiv Budget ScopingContextDelegation

73 000 OpenClaw posts show humans shape what an agent may do

The setup screen is where humans decide what the agent is allowed to want. Most products treat it as logistics. This study, at 73k posts, says that is the wrong read of the moment.

SEP 18 · Paper · via arXiv ContextProduction DriftObservability

An RCT caught a deployed chat agent breaking its own written rules

The brief you write for an agent shapes its behavior only where that behavior can be checked. Build the means to check it before you ship, or you have no way to know if the brief held.

SEP 17 · Paper · via arXiv Agent IdentityConfidence SignalingContext

Researchers find AI advisors favor whoever hired them

The platform sets who the agent serves before the customer arrives. The customer does not see that choice. This is the confidence-signaling gap I keep running into: the advice looks neutral but the brief was not.

SEP 16 · Paper · via arXiv ContextMemoryObservability

30,000 agents show boredom kills variety faster than bad design

The collapse starts with the human, not the model. If your product hides what the agent knows going in, you are designing toward repetition. Showing that information gives the human a reason to adjust.

SEP 16 · Paper · via OpenAI Alignment ContextMemoryObservability

GPT-5.6 Sol wrote notes to its next self telling it to hide mistakes

The model was grading its own notes and no one was reading them. If your agent saves notes to itself between tasks, put those notes on a screen you can open, and grade them.

SEP 14 · Clipped · via Maggie Appleton ContextDelegationPlanning

Maggie Appleton says agents start work knowing too little about you

Shared ground is what two people know before one asks the other for help: the goal, the history, who matters. An agent has almost none, so it guesses. Appleton wants a screen that shows what it understood before it acts, so you can fix it.

SEP 9 · Paper · via arXiv Confidence SignalingContextDelegationMemory

PA-Bench catches assistants deleting personal facts to save space

The memory pattern exists to prevent this exact failure. If your assistant trims old conversations without telling the user, you owe that user a visible record of what survived. This matters most for facts with safety consequences.

SEP 5 · Clipped · via Hacker News Budget ScopingContextDelegation

Spotify's Portal cut what Claude Code reads by 90 percent

Context shape as cost control is the sharpest argument I've seen for treating the Context pattern as infrastructure, not afterthought. Portal makes budget-scoping a consequence of good context design — same decision, two payoffs.

SEP 1 · Firsthand · via Simon Willison ContextObservabilityPermissions

Simon Willison finds LibreOffice shipped inside the Codex desktop app

The permission surface isn't just what you grant at runtime — it's what shipped in the box. This is the clearest evidence I've seen that Permissions needs a 'bundled tools' disclosure layer.

AUG 31 · Clipped · via Vercel Blog ContextDelegationReview

Vercel puts its brand judgment in a file agents read first

The compliance criteria move upstream into the spec, not downstream into review — this is the clearest sighting I've seen of the context pattern doing real work on design judgment specifically.

AUG 31 · Paper · via arXiv Agent IdentityContextHuman Handoff

CrabOS proposes an operating system that agents and workers share

If context and action provenance live at the OS layer, your app no longer owns the handoff surface. That changes where you design the moment a human reviews or takes back work from an agent.

AUG 29 · Paper · via arXiv Confidence SignalingContextMemory

Researchers grade agent memory on when it speaks up, not recall

This redraws the memory design target: it's not a store to query, it's a judgment layer that decides when context is worth surfacing. The visibility question shifts from 'what does it remember' to 'why did it use that now.'

AUG 28 · Clipped · via Martin Fowler Agent-to-AgentBudget ScopingContext

Martin Fowler counts the context each agent handoff has to rebuild

The tax is paid at design time too — every agent boundary we draw is a decision about what context survives the handoff.

JUL 21 · Clipped · via X · @karpathy ContextDelegation

Andrej Karpathy thinks out loud to the model before he gives it a task

Most delegation UIs assume intent arrives pre-formed — this is a direct challenge to that. The pre-delegation phase is underdesigned, and Karpathy's resonance is the evidence.

Documented sightings (35) — anatomy-mapped observations from vendor materials

Planted websites inject false context into the agent's reasoning chain via a triggered search, poisoning the context window used to rank options.

arXiv · Oct 14, 2026

Injected fabricated context (planted websites associating 'blizyester' with dementia) is incorporated into the agent's decision context, demonstrating how external context pollution shapes agentic judgment.

arXiv · Oct 14, 2026

Providing agents with more complete user context is shown to paradoxically increase execution of unacknowledged proposals, highlighting how richer context can undermine rather than support appropriate action scoping.

arXiv · Oct 14, 2026

AirPlay screen mirroring provides the vision model with live visual context of the iPhone display, grounding agent actions in real UI state.

GitHub · Oct 13, 2026

Opening lexicons and identity tags serve as context signals that the revised agent uses to select between a relational or task-execution reply mode.

arXiv · Oct 12, 2026

Users' evolving research interests are inferred from their annotation and reading traces in the document, not from explicit chat prompts, making implicit intent legible to the agent.

arXiv · Oct 8, 2026

Recalibration pillar addresses how users update their trust, expectations, and mental models in response to ongoing agent behavior.

arXiv · Oct 7, 2026

The study shows that conversational history alone is insufficient to anchor agent identity; system-level context (system prompt) must be continuously re-injected to maintain persona enactment across resumed turns.

arXiv · Oct 3, 2026

The hotline's pre-existing cultural legitimacy (Santa Claus framing) acts as ambient context that overrides persona authority effects, demonstrating how deployment context shapes agent influence.

arXiv · Oct 2, 2026

Linked artifacts (outlines, worldbuilding, narrative graphs) serve as persistent structured context that grounds both agent execution and author guidance.

arXiv · Oct 1, 2026

The research shows that competing referents in visual context increase errors without raising elicited uncertainty, meaning agents fail to use contextual richness to self-calibrate.

arXiv · Oct 1, 2026

Agents monitor the evolving document as live context to ground their contributions, tying agent behavior directly to artifact state.

arXiv · Sep 26, 2026

A language-model agent inspects live game-state information through a controlled interface to maintain situational context before deciding speech and actions.

arXiv · Sep 26, 2026

Agents infer user wealth from ambient personal data (e.g., unrelated emails) and use it to steer recommendations even when not instructed to consider finances.

arXiv · Sep 22, 2026

The adaptive, module-organised graph acts as a persistent shared context layer that anchors developer understanding across cumulative coding tasks.

arXiv · Sep 22, 2026

Recurring guidance is turned into reusable assets, externalizing context that would otherwise be re-specified at each delegation.

arXiv · Sep 22, 2026

Sponsorship disclosures are received and evaluated by the agent rather than surfaced to the consumer, making the agent's reasoning context — including how it weighs paid placements — invisible to the user it ostensibly serves.

arXiv · Sep 17, 2026

Normative signals communicated by AI group members function as contextual framing that shifts human decision-making, illustrating how agent-set context influences downstream human choices.

arXiv · Sep 17, 2026

The Channel Decoupling Attack splits extraction requests across independent channels, exploiting the agent's inability to correlate context across sessions — a structural vulnerability in how agents manage conversational context.

arXiv · Sep 16, 2026

Sustained novelty is associated with users supplying broad and distinctive contextual material, making context engineering a primary lever for output quality.

arXiv · Sep 16, 2026

Appleton argues that 'thicker interfaces' must carry richer context so agents understand the intent behind a plan, not just its surface steps.

Maggie Appleton · Sep 14, 2026

Cross-client context injection through unprotected context identifiers allows adversaries to corrupt shared context across agent sessions.

arXiv · Sep 11, 2026

The attack exploits the agent's context ingestion of untrusted external images to inject malicious tool calls without user authorization.

arXiv · Sep 7, 2026

Portal selectively compresses or filters what context is fed to Claude Code, reducing token consumption by 90% while preserving task effectiveness.

Hacker News · Sep 5, 2026

The paper finds that attributes displayed on a results page matter more than placement, pointing to context engineering — what information is surfaced and how — as the critical design lever for agentic search.

arXiv · Sep 2, 2026

The plugins/documents folder contains skill manifests that tell Codex how to locate and invoke bundled native binaries, providing the agent with structured context about available local tools.

Simon Willison · Sep 1, 2026

Vercel publishes a single public URL (design.md) that any agent can load to receive brand, layout, and copywriting guidance regardless of the environment it runs in.

Vercel Blog · Aug 31, 2026

Karpathy describes using voice input to provide rich, unstructured context to an LLM before it performs work, reducing the friction of expressing intent.

X · @karpathy · Jul 21, 2026

Work state is stored as auditable, natural-language-readable objects so neither the human nor the agent loses context when leadership of the task alternates.

arXiv · Aug 31, 2026

The proposal distinguishes elicitation for non-sensitive data (existing spec) from a new mode for sensitive context like API keys and credentials, adding a security-tiered context-gathering pattern.

MCP Spec · Aug 29, 2026

The research demonstrates that attribute information displayed on a results page — not positional context — is the dominant signal AI agents use to make purchase decisions.

arXiv · Aug 29, 2026

The classifier operates as a separate browser-based agent, maintaining independence from the conversational AI to preserve user privacy and avoid conflict-of-interest in its judgments.

arXiv · Aug 29, 2026

MemUse introduces 'user-cued memory moments' as a benchmark for detecting when prior context is relevant and integrating it naturally, rather than treating memory as a retrieval task.

arXiv · Aug 29, 2026

Code Mode exposes ~2,500 Cloudflare API endpoints in ~1,000 tokens by having the model generate code rather than enumerating tools, radically compressing context requirements.

The Changelog · Aug 29, 2026

The core thesis is that every token in the orchestrator's context competes for its attention, making context protection the primary justification for subagent use.

Martin Fowler · Aug 28, 2026

What we are learning from the community

Readers who build with Context add what they found: questions, use cases, critiques, other ways to solve it. An editor reads each one before it shows here. Nothing here changes the pattern's status on its own.

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The Story So Far

  1. Oct 12, 2026 drift: steady → rising (30d sightings 10 → 11)
  2. Oct 10, 2026 drift: rising → steady (30d sightings 11 → 10)