Calculate emissions under the Charcoal methodology

Trigger	Readings are accepted for a period
Outcome	The calculation names the methodology version and gives results with uncertainty.
Sender	Project developer
Receiver	Verification body
Records and receipts	Calculation record with method version, inputs, results and uncertainty; receipt; every receipt carries a tok id
Permissions	Developer runs; verifier checks later; every actor is bound to an EDGE ID and every agent act carries its ATBAN
Regulation	Charcoal is a voluntary standard-setter and certification scheme seeking government recognition; statutory regulator status needs legislation. Modelled on FSMA 2000 s.138I consultation and the FCA Handbook processes; Regulators' Code 2014; Climate Change Act 2008
Blueprint	—
Benchmarks	BM-CHARCOAL-01
tok	tok-b139e5566ee440b0da7db4c618a20e5d

Steps

1	Select the period
2	Run the methodology calculation
3	Record emissions and reductions with uncertainty
4	Approve the calculation
5	Record the calculation receipt

happy path	The calculation names the methodology version and gives results with uncertainty.
receiving side	the verification body sees the calculation record and the same receipt id
failure path	input missing
failure path	method version withdrawn
failure path	expired EDGE ID session
seven widths, both themes	no overflow, no cut text, axe serious or critical = 0
independent re-run	a non-builder agent reproduces the happy path from the reproduce command with the same result