Public changelog

buckybuild.com

Contract history for the buckybuild.com MCP server, every tool-schema change Zevruna has observed, classified from the consumer's perspective.

90-day stability

quietsaferiskybreaking

9Breaking · 90d

9Advisories

17Snapshots kept

2026-10-06Last observed

Advisories

ZV-2026-1779 · 2026-10-04breaking

buckybuild.com: Resource ui://bucky/app.html?v=2fe3621e8038 was removed, consumers reading it will break.

[safe] Resource ui://bucky/app.html?v=2a11dfb44562 was added.

ZV-2026-1674 · 2026-10-01breaking

buckybuild.com: New required field context on cityInventory; requests without it will fail.

[safe] Description of cityInventory changed (13% word delta). [risky] Optional field cityName was added to cityInventory; may shift model behaviour. [risky] Optional field conversation_id was added to cityInventory; may shift model…

ZV-2026-1474 · 2026-09-26breaking

buckybuild.com: New required field llm_model on explainFeasibilityStatus; requests without it will fail.

[safe] Tool cityInventory was added. [safe] Description of explainFeasibilityStatus changed (20% word delta). [risky] Optional field conversation_id was added to explainFeasibilityStatus; may shift model behaviour. [risky] Description of…

ZV-2026-1357 · 2026-09-23breaking

buckybuild.com: Resource ui://bucky/app.html?v=dd2b57200594 was removed, consumers reading it will break.

[safe] Resource ui://bucky/app.html?v=632f421b05ca was added.

ZV-2026-1338 · 2026-09-23breaking

buckybuild.com: Resource ui://bucky/app.html?v=158fb187cf87 was removed, consumers reading it will break.

[safe] Tool previewSiteCoverage was added. [safe] Description of getBuckyMcpGuide changed (5% word delta). [safe] Resource ui://bucky/app.html?v=dd2b57200594 was added.

ZV-2026-1315 · 2026-09-22breaking

buckybuild.com: Resource ui://bucky/app.html?v=48a465c08e93 was removed, consumers reading it will break.

[risky] Description of getBuckyMcpGuide changed (77% word delta). [risky] Optional field market was added to getBuckyMcpGuide; may shift model behaviour. [risky] Optional field role was added to getBuckyMcpGuide; may shift model behaviour…

ZV-2026-1266 · 2026-09-21breaking

buckybuild.com: Resource ui://bucky/app.html?v=ae1e2640f51d was removed, consumers reading it will break.

[safe] Resource ui://bucky/app.html?v=48a465c08e93 was added.

ZV-2026-1263 · 2026-09-21breaking

buckybuild.com: Resource ui://bucky/app.html?v=3a7dffdec63e was removed, consumers reading it will break.

[risky] Enum value derived_from_cited added to status on explainFeasibilityStatus. [risky] Enum value defaulted added to status on explainFeasibilityStatus. [risky] Enum value missing added to status on explainFeasibilityStatus. [risky]…

ZV-2026-1259 · 2026-09-21breaking

buckybuild.com: Resource ui://bucky/app.html was removed, consumers reading it will break.

[safe] Resource ui://bucky/app.html?v=3a7dffdec63e was added.

Contract changelog

Every revision Zevruna has observed, classified from the consumer's side. Advisories above are the subset severe enough to publish.

2026-10-04 17:08breaking

breaking Resource ui://bucky/app.html?v=2fe3621e8038 was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=2a11dfb44562 was added.

2026-10-01 21:35risky

safe Tool getBylawSection was added.
safe Tool screenLots was added.
risky Description of getFeasibilitySnapshot changed (37% word delta).

2026-10-01 17:19breaking

safe Description of cityInventory changed (13% word delta).
risky Optional field cityName was added to cityInventory; may shift model behaviour.
breaking New required field context on cityInventory; requests without it will fail.
risky Optional field conversation_id was added to cityInventory; may shift model behaviour.
risky Optional field geoDivisionId was added to cityInventory; may shift model behaviour.
risky Optional field lat was added to cityInventory; may shift model behaviour.
breaking New required field llm_model on cityInventory; requests without it will fail.
risky Optional field lng was added to cityInventory; may shift model behaviour.

+ 2 more in this revision

2026-09-26 16:59breaking

safe Tool cityInventory was added.
safe Description of explainFeasibilityStatus changed (20% word delta).
risky Optional field conversation_id was added to explainFeasibilityStatus; may shift model behaviour.
breaking New required field llm_model on explainFeasibilityStatus; requests without it will fail.
risky Description of getBuckyMcpGuide changed (76% word delta).
risky Optional field conversation_id was added to getBuckyMcpGuide; may shift model behaviour.
breaking New required field llm_model on getBuckyMcpGuide; requests without it will fail.
risky Description of getFeasibilitySnapshot changed (65% word delta).

+ 24 more in this revision

2026-09-23 14:43breaking

breaking Resource ui://bucky/app.html?v=dd2b57200594 was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=632f421b05ca was added.

2026-09-23 02:21breaking

safe Tool previewSiteCoverage was added.
safe Description of getBuckyMcpGuide changed (5% word delta).
breaking Resource ui://bucky/app.html?v=158fb187cf87 was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=dd2b57200594 was added.

2026-09-22 16:00breaking

risky Description of getBuckyMcpGuide changed (77% word delta).
risky Optional field market was added to getBuckyMcpGuide; may shift model behaviour.
risky Optional field role was added to getBuckyMcpGuide; may shift model behaviour.
risky Optional field scale was added to getBuckyMcpGuide; may shift model behaviour.
breaking Resource ui://bucky/app.html?v=48a465c08e93 was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=158fb187cf87 was added.

2026-09-21 15:44breaking

breaking Resource ui://bucky/app.html?v=ae1e2640f51d was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=48a465c08e93 was added.

2026-09-21 14:40breaking

risky Enum value derived_from_cited added to status on explainFeasibilityStatus.
risky Enum value defaulted added to status on explainFeasibilityStatus.
risky Enum value missing added to status on explainFeasibilityStatus.
risky Description of getProjectContext changed (38% word delta).
risky Optional field project was added to getProjectContext; may shift model behaviour.
risky Description of produceProjectReport changed (26% word delta).
risky Optional field project was added to produceProjectReport; may shift model behaviour.
safe Field projectId on produceProjectReport is no longer required.

+ 13 more in this revision

2026-09-21 12:31breaking

breaking Resource ui://bucky/app.html was removed, consumers reading it will break.
safe Resource ui://bucky/app.html?v=3a7dffdec63e was added.

2026-09-15 04:58risky

safe Tool setProjectMapListing was added.
risky Description of explainFeasibilityStatus changed (30% word delta).
risky Enum value site_specific_schedule added to status on explainFeasibilityStatus.
safe Description of getFeasibilitySnapshot changed (6% word delta).
safe Description of getProjectContext changed (24% word delta).
risky Description of saveToProject changed (36% word delta).
risky Optional field externalRef was added to saveToProject; may shift model behaviour.
safe Field submissionId on submitBuckyFeedback is no longer required.

+ 2 more in this revision

2026-08-31 20:05risky

Description of saveToProject changed (33% word delta).

2026-08-31 17:20risky

Description of saveToProject changed (33% word delta).

Snapshot log

The hashes to pin against. Identical contracts hash identically.

Observed	Contract hash	Tools
2026-10-06 21:08	f77c8d4d737e	15
2026-10-05 18:11	1581dd90a265	15
2026-10-04 17:08	08839875a8de	15
2026-10-02 18:03	04f1fe158b4f	15
2026-10-01 21:35	be455262215e	15
2026-10-01 17:19	417cc29334d8	13
2026-09-26 16:59	36b9b27e9dec	13
2026-09-23 14:43	ba4c4ed62b7d	12
2026-09-23 02:21	d144dc6d4f66	12
2026-09-22 16:00	09d642e8c938	11
2026-09-21 15:44	2f474e4e3c92	11
2026-09-21 14:40	a7a51952984b	11
2026-09-21 12:31	f72d01bb5057	11
2026-09-15 04:58	7a68b50d6c21	11
2026-08-31 20:05	81c0785cc351	10
2026-08-31 17:20	fc3c474dd8c5	10
2026-08-31 06:04	81c0785cc351	10

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