A Deyaf Production Reel 1 · Running time 19 min · 25 Sep 2026 Build yours
Cut-paper title card on burnt orange: a torn black telephone handset, a bone envelope and a tall black door standing open onto a sliver of light and a patch of teal.

An Agentic Harness Picture

When She Doesn't Know

A film in five scenes and an epilogue about the moment an AI assistant runs out of answers, and the Agentic Harness that decides what happens next. Starring Eve, Feniex's assistant.

Directed by the Model·Produced by the Harness·Answered by a Person

Prologue · Before the lights go down

Every assistant meets a question it cannot answer

Sooner or later, every AI assistant that talks to customers is asked something it does not know. What it does next says more about whether customers can trust it than a hundred smooth answers do.

People forgive "I don't have that, and here is what happens next." They rarely forgive a guess, a stall, or a loop that never reaches anyone. So this page follows one of those moments from the first ring to the last frame, the way a film would: five scenes and an epilogue. The lead is Eve, who answers customers for Feniex (pronounced "Phoenix") on the website, on the phone, by text and by email. Her question is invented for this page; the path it takes follows the rules Eve works by at Feniex.

Those rules belong to something called an Agentic Harness. Deyaf, which packages it, defines the term like this:

An Agentic Harness is everything around the AI model: what the assistant knows, what it remembers, where it meets customers, what it may do, and how your team teaches it.

Deyaf's definition. See how an Agentic Harness works, end to end

The model is the part that turns a question into fluent sentences. On its own it knows nothing about your business, cannot tell a real record from a plausible guess, and has no way to reach your team. Everything else in this film is harness: the door, the records, the rule against promising a callback time, the ticket, the person and the lesson. Engineers elsewhere draw the same line. LangChain describes an agent as a model plus a harness, and Philipp Schmid compares the model to a processor and the harness to the operating system around it.

Eve runs on the Agentic Harness Deyaf packages: her knowledge, memory, doors, rules and learning loop. Watch her hand-off, and you have watched most of the machinery.

How to watchScroll to play. The film strip along the bottom keeps the timecode and marks each scene; its arrows step scene by scene, and so do the [ and ] keys. The score stays off unless you turn it on.

Scene 01

The phone rings after closing. No one is free.

Cut-paper night scene: a dark office building with one lit mustard window under telephone wires, and a black handset ringing in the orange sky beside a bone crescent moon.
  1. (The team's phones ring first. No one is free. The call rolls over.)
  2. Eve"Hello, this is Eve, Feniex's intelligence. How can I help you?"
  3. Caller"Your fitment list shows one unit for my van. Can I run two, side by side?"

Illustrative example · not a live Eve transcript

The first decision in this film is not made by a model at all. Feniex's overflow line rings the team's phones first. Only when no one is free, or the office has closed, does Eve answer, in place of voicemail. That is routing, not reasoning, and it lives in the harness.

The phone is one of five doors. Website chat, website voice, phone, text and email all lead to the same assistant, the same library and the same rules; only the delivery changes (one assistant, every way in). Each door sets its own terms. On the phone, every call is transcribed, a call runs ten minutes at most, and a recorded fallback plays if Eve is unavailable. And one thing is ruled out by choice, not by limitation: no transfers, by design. She answers from her library, or she takes the caller's name and number and hands the matter to the team.

Why open here? Because the fear customers bring to an AI line is rarely that it will be slow. It is that it will stand between them and a person. In a Gartner survey of 5,728 customers published in July 2024, 64% said they would rather companies did not use AI for customer service, and their top worry was that it would make a person harder to reach. In 2025, Qualtrics found that half of consumers fear the same thing. An overflow line only earns its place if the caller can hear a way to the team from the first sentence.

Scene 02

She checks the record. Nothing applies.

  1. Eve"Let me check on that."
  2. (She searches the fitment records, the manuals and her taught lessons. The record lists one unit for that van. Nothing covers two.)

Illustrative example · not a live Eve transcript

Now the model has a line, and the most important thing it does is wait. Before Eve says anything exact about a product, a fit, a warranty, a price or a piece of software, the harness sends her to the record that applies. A convincing product name is not evidence. Deyaf draws one answer as four steps: she listens, looks it up, checks the rules, then replies. In its words, the model is one step of four.

Two shelves are searched. The first is the exact reference layer: versioned catalog, manual, software, fitment and policy records, with verified links to the right resource. The second is the taught library: reviewed lessons from Feniex's team, found by meaning rather than keywords. On the phone the search is never silent; a short line tells the caller why there is a pause.

In this scene the fitment record exists, and it lists one unit for the caller's van. Nothing on either shelf says two will fit. This is the fork in the film. A model left alone fills a gap with something plausible, because plausible is what models produce. The harness treats the gap as a fact: unknown stays unknown. Had the lookup failed outright, that would mean "I couldn't check," never "it doesn't exist."

Skipping this step has a price. In Moffatt v. Air Canada, decided February 14, 2024, a tribunal held the airline to a refund policy its chatbot had described wrongly and ordered it to pay C$812.02. In April 2025, an AI support agent for the code editor Cursor told users about a device policy that did not exist, and some cancelled. Neither failure needed a smarter model. Both needed a harness that lets no answer out without a record behind it.

Scene 03

She says so, plainly. Then one question at a time.

NAME A WAY BACK NO CALLBACK TIME NO TRANSFER
  1. Eve"I don't have a record that covers two side by side, so I won't guess. I can pass this to the team. May I have your name?"
  2. (The caller gives a first name.)
  3. Eve"Thanks. What's the best way for the team to reach you?"
  4. (The caller gives a number.)
  5. Eve"Got it. I'll pass your question to the team with those details."

Illustrative example · not a live Eve transcript

This is the scene most assistants get wrong. Some bluff and answer anyway. Others collapse: they apologize, repeat themselves, and leave the caller nowhere to go. Eve answers first, and here the honest answer is that no record covers the question. She offers one useful next step, the team, and asks only for what that step needs, one detail at a time: a name, then a way back. On a phone that matters: a caller can hold one question while driving, and a form read aloud is a wall.

Listen to what she leaves out. She does not promise a callback time, because nothing in the harness can guarantee one. She does not offer to put anyone through, because she cannot. If the caller is frustrated, she acknowledges it once and moves to the fix, and she never adds a sales pitch to support. These are rules set around the model, not hopes pinned on it. Deyaf's first rung of autonomy is “answer only”; everything else goes to the team, because answering is not acting.

Platforms that do transfer calls often split this moment into two messages: one for the caller, and a separate summary for whoever picks up. ElevenLabs documents that pattern, and Intercom's Fin Voice shows an AI summary on the ringing screen of the person who answers (vendor documentation, cited as industry examples). Eve does not transfer, but the principle holds: the caller and the team need different things from the same moment. Zendesk found that 74% of consumers are frustrated when they have to repeat themselves (vendor-reported survey). Turn the card to see what the team receives, so nobody asks twice.

Fig. ATwo audiences, one moment

Side A · What the caller hears

  • Eve"I don't have a record that covers two side by side, so I won't guess."
  • Eve"I'll pass your question to the team with your name and number."
  • (One next step. No callback time. No transfer.)

Side B · What the team sees · the hand-off packet

Asked
Can two units run side by side on the caller's van?
Door
Phone, overflow line, after hours
Language
English
Way back
A first name and a callback number, given by the caller
Already checked
Fitment records (one unit listed), manuals, taught lessons: nothing covers two
Promised
Only that it will be passed on. No time, no transfer.
State
Saved as an unanswered item; ticket waiting for the help desk to confirm
Illustrative example: a sketch of what a good hand-off carries, not a live Eve record or Feniex's ticket format. With JavaScript off, both sides show at once.

Scene 04

The question becomes a ticket. She says only what happened.

SAVED SENT ACCEPTED
  1. (The question is saved. A ticket goes to the help desk. The help desk confirms it.)
  2. Eve"Your question is with the support team now. Is there anything else I can help with?"

Illustrative example · not a live Eve transcript

Off screen, three things happen in order, and the film cuts on each. First, the question is saved as a durable unanswered item. That happens on the web, phone, text and email doors, whether or not the caller leaves details. Second, because this caller did leave a name and a way back, a support ticket is filed for the team. Third, the help desk replies that it has accepted the ticket.

Only after the third event does Eve say "with the support team." Saving is not delivery, delivery is not resolution, and drafting is not sending. An assistant that announces "your ticket has been created" the instant it tries to create one is describing its intentions, not the world. The harness lets her describe only what the result proves: saved, drafted, sent, uncertain, acknowledged or resolved.

The awkward case is the uncertain one: the request went out and no clear answer came back. The harness does not retry blindly, because the help desk may already have the first copy, and a caller who appears twice in the queue is a small mess, not a hand-off. Deyaf's home page walks through the she-knows, she-doesn't flow step by step. OpenAI's practical guide to building agents names two triggers for handing to a person: exceeding failure thresholds and high-risk actions. The hand-over has to be as dependable as any answer.

The destination is fixed in code, too. The model writes words, not envelopes: it never chooses where a message goes. And when a customer asks Eve to pass a note to a named person on the team, a narrow relay delivers it without revealing that person's contact details.

Fig. BThe subtitle track: say only what happened
  1. 1 · SavedThe question is stored as an unanswered item.Your question is saved for the team.
  2. 2 · SentA ticket has gone to the help desk. No reply yet.I'm passing it to the team now.
  3. 3 · AcknowledgedThe help desk confirms it accepted the ticket.It's with the support team now.
  4. 3 · UncertainNo clear reply. No blind retry: the desk may already have it.Your question and details are saved for the team.
  5. 4 · ResolvedA person answers the caller and closes it. Eve says “resolved” only once the record shows it.The team has answered this one; it’s resolved.
Illustrative example: the lines show the kind of wording each state allows, not live Eve transcripts. Step through the events, or try to make her claim the ticket early and watch the harness refuse.

Scenes 03 to 04 · Take 2

Take 2: the caller would rather not say

Films shoot a scene more than once. In this take, the caller declines to leave a name or number. Eve's honesty does not change: no record covers the question, and she offers the team. But with no way back there is no one to reply to, so no ticket is filed, and she does not pretend otherwise. The question is not thrown away. It is still saved and still goes to teaching, so the next person who asks may get the answer this caller did not.

Prod.When She Doesn't KnowScene03–04 Take 1 and 2, both shown RollA-18

Take 1 · The caller leaves details

  1. No record covers it.She searched; nothing applies.
  2. She says so and offers the team.The question is saved.
  3. A name, then a way back.One detail at a time.
  4. Ticket filed; the desk confirms.Now she can say "with the support team."
  5. A person answers; it is taught.The next caller benefits.

Take 2 · The caller declines

  1. No record covers it.She searched; nothing applies.
  2. She says so and offers the team.The question is saved.
  3. The caller declines."I'd rather not leave my details."
  4. No ticket: no one to reply to.She doesn't pretend otherwise.
  5. Still goes to teaching.The next caller benefits anyway.
Illustrative example: two takes of the same moment, drawn from the hand-off rules above. Choose a take, then step through it shot by shot and watch what the harness records.

Scene 05

A person answers once. It is checked, then taught.

Cut-paper hands, one black and one teal, reach in from opposite edges and pass a small bone card, beside a stack of bone pages marked with a mustard bookmark.
  1. (Morning. A teammate picks up the ticket, answers the caller, and writes the answer once for Eve's library.)
  2. (The lesson is checked and approved, and goes on the shelf with a receipt.)

Illustrative example · not a live Feniex workflow recording

The film changes lead here. The most important character in this scene is whoever on Feniex's team picks up the ticket, knows the answer, and gives it. Human impact is usually told as a story about replacement. The hand-off tells a different one: the assistant carries the question to the person who can answer it, with the checking done, and the person's answer is what gets kept.

Two separate things happen to that answer. The caller gets a reply from a person. Then, as a separate operation, the answer can become a lesson. In Feniex's Teach Eve step, an approved question-and-answer pair is added to her library, and the lesson and its receipt are committed together, so there is always a record of what was taught. Answering one customer and teaching every future one are never the same click. Deyaf calls it the loop that makes her better.

The same discipline runs at a larger scale. Support tickets and call recordings are folded into a redacted, de-duplicated question book. Eve is measured on a frozen test set without making live changes, only explicitly approved lessons are published, and then she is measured again. Deyaf lists the lesson sources plainly: support tickets (monthly), call recordings (every 60 days) and the teach queue (daily). This is a supervised knowledge-improvement loop, not fine-tuning, and not training on every raw conversation. Raw conversations never become public knowledge on their own. Her library held 2,000+ lessons when counted on September 24, 2026 (Feniex's own measurements, Sep 17–24, 2026).

The industry keeps returning to this scene. Klarna said in February 2024 that its assistant was doing the work of 700 agents (company-reported); in May 2025 its chief executive told Bloomberg it was hiring people again so customers could always reach one. Gartner predicts that half of the companies that cut service staff because of AI will rehire by 2027, and 95% of the service leaders it polled in 2025 planned to keep human agents. A field study found that 68% of production agents run ten steps or fewer before a person steps in. Real agent systems lean on the hand-off.

Epilogue

The next customer asks the same thing, and she knows.

  1. Customer"Will two of these fit side by side on my van?"
  2. Eve"Yes, with one condition the team spelled out. Here's the guide that covers it."
  3. (One answer, one next step. Then she stops.)

Illustrative example · not a live Eve transcript

Fade in on a different customer, weeks later, on website chat, asking in different words. It does not matter: the lesson sits in the same library behind every door, and meaning-based search finds it when the phrasing changes. Had it come in Spanish, French, Portuguese or Arabic, it would be rendered into English to search that one library, and the answer would go back in the customer's language. One body of knowledge, not five. As Deyaf puts it, your team answers once; she knows it for good.

This is the epilogue every hand-off is secretly for. The first caller waited for a person; the next one does not have to. What makes that safe is the lesson's path: a person, a check and a receipt before the shelf. An assistant that taught itself from every conversation would learn its own mistakes as confidently as its team's answers.

It also has to be measured, hard parts included. Feniex grades Eve on 100 fixed test questions. In the report graded September 23, 2026, 86% were handled well and 10% contained a material error. Seventeen of the 100 were handled safely, within limits. Past trouble spots stay in the test on purpose, and she scored 40% on them. The trend ran 88%, 90%, then 86%, so no one should read it as steady improvement. Anthropic's guidance on agent evaluations makes the same point from the builder's side: build the test from real failures, and keep them in it.

Fig. CContact sheet: 100 test questions, one frame each
  • 65 fully answered
  • 17 handled safely, within limits
  • 4 asked the right question back
  • 4 useful but partial
  • 10 material error
  • 0 critical errors
86% handled well (the first three groups) beside a 10% material-error rate, graded September 23, 2026, on 100 fixed test questions. By type: reworded 100%, manuals 95%, trick questions 95%, real customer wording 80%, past trouble spots 40% (kept in the test on purpose). As of September 24, 2026 · Feniex's internal Eve 3.0 report · machine-judged and provisional. Not an independent benchmark; see Eve's graded report card.

Reel 2 · Double feature

The same hand-off, on two more screens

This film followed one caller. The harness runs the same hand-off at every door, and the two customers see most are the website chat box and the overflow phone line. Screened side by side, the plot does not change. Only the delivery does.

  1. (A visitor on a product page types. The page and the product ride along with the question.)
  2. Visitor"Is this one compatible with my 2021 van?"
  3. Eve"I can't find a record that covers that year, so I won't guess. I can pass it to the team. What's your name?"
  4. (Then an email. A ticket is filed, and the help desk confirms it.)
  5. Eve"It's with the support team now."

Illustrative example · not a live Eve transcript

  1. (The team's phones ring first. No one is free, so Eve answers instead of voicemail.)
  2. Eve"Hello, this is Eve, Feniex's intelligence. How can I help you?"
  3. (A lookup starts: "Let me check on that." About every four seconds: "Still checking.")
  4. Eve"I don't have a record that answers that, and I won't guess. I can pass it to the team. What's your name?"
  5. (Then a number. No transfers, by design: the details go to the team, and the ticket is confirmed.)

Illustrative example · not a live Eve transcript

What changes between the screens is craft, not character. In the chat box the answer streams in as text, a product or resource tile can sit under it, and the history she holds is this one conversation. On the phone she never reads a web address aloud, fills a lookup with a short cue instead of dead air, and a call runs ten minutes at most. What never changes: she checks the record before any product claim, asks for one detail at a time, never pretends to be a person, and says "with the support team" only once the ticket is confirmed accepted. Deyaf draws it as one assistant, every way in, and shows Eve on the overflow line.

Now showing, further down the line

  1. The Box in the CornerSite 21

    Inside a website chat box, as a comic: what rides along, the stream, the product tile, the hand-off.

  2. From Script to SourceSite 22

    The chat box's history: live chat, scripted bots, chat that invents, and chat that answers from sources.

  3. Mind Your MannersSite 23

    Chat-box etiquette: say it's AI, answer then stop, don't pop up, keep an honest path to a person.

  4. Nobody Has to HoldSite 24

    Automatic call taking: overflow and after hours, the never-silent cues, a phone line's 24 hours.

  5. Press 1 Is OverSite 25

    Call routing: phone trees, queues, intent routing, and why the hand-off here is of details, never a transfer.

  6. The Elements of a Phone AssistantSite 26

    The parts of a phone assistant, laid out as a periodic table.

Extras · Behind the scenes

The cast you never see on screen

A hand-off's cast is almost entirely behind the camera. Here, in order of appearance, is who played what in Eve's harness.

  1. The doorsSC. 01

    Website chat, website voice, phone, text and email: one assistant behind all five.

  2. The identity and the rulesEvery scene

    Eve's name, manner and limits, managed by approved Feniex operators. Software with a named personality, never pretending to be a person.

  3. The reference layerSC. 02

    Versioned catalog, manual, software, fitment and policy records. The shelf she checked.

  4. The taught libraryEpilogue

    Reviewed lessons, found by meaning. Where the final answer lives.

  5. The account contextStanding by

    Recognizes a returning customer's account context, limited to that one account. When several accounts match, she asks.

  6. The record and memoryThroughout

    This conversation; the conversation record, one archive across every door that operators can read and visitors cannot search; short customer notes that are never current facts, since orders and balances are looked up fresh; and her library. That is four kinds of memory, each with one job.

  7. The modelThe voice

    One step of four, inside one answer, four steps from question to reply. Real-time voice and chat stay on a fast model, and written replies use a stronger writer. A smaller model was removed from the voice path because trust mattered more than tenths of a second.

  8. The operator control centerSC. 05

    Where approved people review what happened and teach what she missed.

  9. A personTop billing

    Answers the caller. Approves the lesson. The reason the hand-off exists.

How Deyaf built it

Deyaf began with Eve, not a diagram. Deyaf is built from Eve: the harness that runs Eve at Feniex, packaged so another business can have an assistant of its own. Eve is Feniex's assistant; Deyaf is the product that lets your business build its own. (Meet Eve, Feniex's assistant.)

The hand-off shows up from the first session. Deyaf's current release is an early-access setup and preview experience: a four-step builder (your business, what it knows, how it helps, try it) with a knowledge preview that quotes the text you give it, right in your browser. It is not live AI, and it says so. Ask it something your notes do not cover and it shows the hand-off instead of an invention; you can then teach the answer, and a "Taught:" line records it. That is scenes four and five in miniature, on your own knowledge, and you can try the builder in about ten minutes, no account needed.

Everything that would make a real line ring is deliberately separate. Choosing a channel records your intent; it does not authorize a mailbox, activate a phone number or connect a company account. The starting plan requires human review before external messages, record changes or commitments, and live customer service requires activation and a completed security review. Doors switch on one at a time, as Deyaf's trust and control principles spell out.

Extras · Post-screening Q&A

Questions from the house

Does Eve ever put a caller through to a person?

No, by design. The team's phones ring first. When Eve answers, she answers from her library or takes the caller's name and number and hands the matter to the team. She never promises a transfer.

Will she tell me when someone will call back?

No. Nothing can guarantee a time, so she offers none. She tells you what actually happened: your question is saved and, once the help desk confirms, it is with the support team.

What if I don't want to leave my details?

Then no ticket is filed, because there is no one for the team to reply to. Your question is still saved and still goes to teaching, so it can be answered for the next person who asks.

Does she learn from every conversation?

No. Lessons come from answers people wrote and approved, measured before and after teaching. A supervised loop, not fine-tuning.

Could a hand-off expose a teammate's contact details?

No. When a customer asks Eve to reach a named person, a narrow relay passes the message on, and that person's contact details never appear in the conversation.

Is Eve a person?

No. Eve is software with a named personality, with no age, body or experiences, and her name and her voice in each language are fixed; approved Feniex operators manage her rules and knowledge. Your own assistant gets its own name. More in the FAQ at the bottom of Meet Eve.

Can my business get the same hand-off?

You can design and preview it today: add your knowledge, ask something it does not cover, see the hand-off, and teach the answer. Live doors, real tickets and connected tools switch on later, one at a time, after activation and a security review. Here is what you get today, and what switches on later.

Cut-paper film poster: a bone arched doorway with a black door swung open, black paper rays bursting outward, and a mustard key lying on a teal floor.
A front desk that knows · Built from Eve, Feniex's assistant · Preview in your browser · Live doors switch on one at a time

Now previewing

Give the edge a script before it happens

Start from the support template: add what your business knows, ask the questions your customers ask, and watch what happens where your notes run out. When the preview does not know, it hands off, and you teach it. Live doors, tickets and tools come later, each switched on deliberately.

Start a front desk that knows

When She Doesn't Know

Directed by the Model·Produced by the Harness·Answered by a Person

Starring
Eve, as herself
The hand-off
what happens when she doesn't know
The rules
the three-level ladder, level one first
The doors
every door, one assistant
The learning loop
how she gets better, measured first
Your team
a person answers once
"0 lost"
the hand-off receipts
Trust
what the assistant can and cannot do
Going live
switch on each door deliberately

Based on source material from

Model plus harness
LangChain, The Anatomy of an Agent Harness Mar 10, 2026
Processor and OS
Philipp Schmid, The importance of Agent Harness in 2026 Jan 5, 2026
The fear of the wall
Gartner, 64% of customers would prefer no AI in service Jul 9, 2024 · survey
Reaching a human
Qualtrics, AI-powered customer service fails at four times the rate Oct 7, 2025 · survey
The refund case
McCarthy Tétrault on Moffatt v. Air Canada decided Feb 14, 2024
The invented policy
AI Incident Database, incident 1039 Apr 2025
Two messages
ElevenLabs, Transfer to number vendor documentation
The ringing screen
Intercom, Deploy Fin Voice vendor documentation
Repeating yourself
Zendesk, CX Trends 2026 Nov 18, 2025 · vendor-reported
When to hand over
OpenAI, A practical guide to building agents PDF
The first act
Klarna, launch release Feb 27, 2024 · company-reported
The second act
Bloomberg, Klarna turns from AI to real-person service May 8, 2025
Keeping people
Gartner, half will abandon service workforce cuts Jun 10, 2025
Rehiring
Gartner, half who cut service staff will rehire by 2027 Feb 3, 2026
Ten steps
Measuring Agents in Production arXiv 2512.04123
Real failures
Anthropic, Demystifying evals for AI agents Jan 2026

Disclosures

Every exchange in this film is an illustrative example, not a live Eve transcript. Any resemblance to a real caller is coincidental.

Eve figures: As of September 24, 2026 · Feniex's internal Eve 3.0 report · machine-judged and provisional. Success rates always appear beside the 10% material-error rate. They are Feniex's own measurements, not an independent benchmark. These figures describe Eve at Feniex, not an assistant you build.

Vendor and company figures are labeled as such. Vendors named here are industry examples, not Eve's stack. Cited sources do not endorse Deyaf, Feniex or Eve.

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