* create a README on Runtime APIs
* add ParaId type
* write up runtime APIs
* more preamble
* rename
* rejig runtime APIs
* add occupied_since to `BlockNumber`
* skeleton crate for runtime API subsystem
* improve group_for_core
* improve docs on availability cores runtime API
* guide: freed -> free
* add primitives for runtime APIs
* create a v1 ParachainHost API trait
* guide: make validation code return `Option`al.
* skeleton runtime API helpers
* make parachain-host runtime-generic
* skeleton for most runtime API implementation functions
* guide: add runtime API helper methods
* implement new helpers of the inclusion module
* guide: remove retries check, as it is unneeded
* implement helpers for scheduler module for Runtime APIs
* clean up `validator_groups` implementation
* implement next_rotation_at and last_rotation_at
* guide: more helpers on GroupRotationInfo
* almost finish implementing runtime APIs
* add explicit block parameter to runtime API fns
* guide: generalize number parameter
* guide: add group_responsible to occupied-core
* update primitives due to guide changes
* finishing touches on runtime API implementation; squash warnings
* break out runtime API impl to separate file
* add tests for next_up logic
* test group rotation info
* point to filed TODO
* remove unused TODO [now]
* indentation
* guide: para -> para_id
* rename para field to para_id for core meta
* remove reference to outdated AvailabilityCores type
* add an event in `inclusion` for candidates being included or timing out
* guide: candidate events
* guide: adjust language
* Candidate events type from guide and adjust inclusion event
* implement `candidate_events` runtime API
* fix runtime test compilation
* max -> min
* fix typos
* guide: add `RuntimeAPIRequest::CandidateEvents`
* add availability bitfield types to primitives
* begin inclusion module
* use GitHub issue link for limitation
* fix some compiler errors
* integrate validators into initializer
* add generic signing context
* make signing-context more generic
* fix issues with inclusion module
* add TODO
* guide: add validators and session index to inclusion
* guide: add session index to change notification
* implement session change logic
* add BackedCandidate type
* guide: refine inclusion pipeline
* guide: rename group_on to group_validators
* guide: add check about collator for parathread
* guide: add last_code_upgrade to paras and use in inclusion
* implement Paras::last_code_upgrade
* implement most checks in process_candidates
* make candidate receipt structs more generic
* make BackedCandidate struct more generic
* use hash param, not block number
* check that candidate is in context of the parent block
* include inclusion module in initializer
* implement enact-candidate
* check that only occupied cores have bits set
* finish implementing bitfield processing
* restructure consistency checks on candidates
* make some more primitives generic
* signature checking logic for backed candidates
* finish implementing process_candidates
* implement collect_pending
* add some trait implementations to primitives
* implement InclusionInherent and squash warnings
* test bitfield signing checks
* rename parachain head to para_head
* fix note_new_head bug in paras
* test bitfield enactment in inclusion
* helpers for candidate checks
* add test for most candidate checks
* add test for backing setting storage
* test session change logic
* remove extraneous type parameter
* remove some allow(unused)s
* extract threshold computation to const fn
* remove some more allow(unused)s
* improve doc
* add debug assertion
* fix primitive test compilation
* tag unanimous variant as unused
* file structure and initializer skeleton
* ensure session changes happen before initialization
* add a couple tests for initializer flow
* integrate with session handling
* configuration update logic
* configuration methods
* move test mock to its own module
* integrate configuration into initializer
* add note about initialization order
* integrate configuration module into mock
* add some tests for config module
* paras module storage
* implement paras session change operation
* amend past code pruning to fully cover acceptance period
* update guide again
* do pruning of historical validation code
* add weight to initialization
* integrate into mock & leave notes for next session
* clean up un-ended sentence
* alter test to account for double index in past code meta
* port over code-at logic test
* clarify checking for conflicting code upgrades
* add genesis for paras, include in mock, ensure incoming paras are processed
* note on return value of `validation_code_at`
* implement paras routines from implementor's guide
* bring over some existing tests and begin porting
* port over code upgrade tests
* test parachain registration
* test code_at with intermediate block
* fix warnings
* clean up docs and extract to separate struct
* adjust implementor's guide to include replacementtimes
* kill stray println
* rename expected_at to applied_after
* rewrite ParaPastCodeMeta to avoid reversal
* clarify and test interface of validation_code_at
* make FutureCode optional
* rename do_old_code_pruning
* add comment on Option<()> to answer FAQ
* address some more grumbles
Fedor Sakharov