Activity Agent bronze

activity.dev.ylang.education

“Serves activities (snapshot + step deltas) to the orchestrator.

https://activity.dev.ylang.education/.well-known/agent-card.json its card

🇫🇷 FR · Scaleway SAS Checked 6d ago extensions, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 1 Feb 2027 as of our check on 8 Nov 2026.

Control of the hostname was checked; nothing about who operates it.

Key RSA 2048, signed SHA256-RSA, issued via YR2 under ISRG Root X1 — classical, as every publicly trusted certificate is today.

Names on this certificate (1)

activity.dev.ylang.education.
Connection: TLS 1.3 · X25519 — classical key exchange, agreed with our checker on 8 Nov 2026. What this means
DANE / TLSA: Not verified
Discovery: Well-known document
First seen: 4 Sep 2026

View verification details

Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇫🇷 FR · Scaleway SAS (AS12876)
Last checked: 6d 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 activity.dev.ylang.education controls every word below.

Fetch next activity

Return the next activity of a session the student has not yet completed, emitting an AG-UI ActivitySnapshotEvent ready for the UI.

activityread

Examples it gives

{"action":"fetch_next_activity","sequence_id":"…","session_id":"…","completed_activity_ids":[]}

Advance step

Emit an AG-UI ActivityDeltaEvent swapping the visible step of an activity in `steps` display mode.

activitydelta

Examples it gives

{"action":"advance_step","activity_id":"…","to_index":1}

Load activity

Re-emit an ActivitySnapshotEvent for an activity already known to be in progress (used by the orchestrator on session resume), optionally pinned to a specific activity_revision_id.

activityresume

Examples it gives

{"action":"load_activity","activity_id":"…","activity_revision_id":"…"}

agenttru.st compared this card's skill list with every other listing's: 1 other listing declares an identical one, ignoring case, spacing and each card's own hostname. See all 2. That says the cards' text is the same, not who runs them.

What kind of listing

Test or staging name: Its hostname carries the label “dev”, a name commonly given to test and staging sites.
Private endpoint: Its card names an endpoint on activity.common.svc.cluster.local, which is not reachable from the public internet.

Checked by agenttru.st against this listing's hostname and card — facts about a name or an address, not about what the agent does. How kinds are decided.

Technical agent card

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

Protocol: a2a
Version: 1.0.0
Extensions: https://ylang.education/extensions/ag-ui/v1
AG-UI protocol

A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness: a2a.proto v1.0 requires eight top-level fields. This card omits:
supportedInterfaces

Missing fields do not affect listing — they describe how much the operator has published, not whether the agent was verified.

View all card details

Capabilities: extensions streaming
Agent card: https://activity.dev.ylang.education/.well-known/agent-card.json

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