diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..be3f7b2 --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +our General Public Licenses are intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + Developers that use our General Public Licenses protect your rights +with two steps: (1) assert copyright on the software, and (2) offer +you this License which gives you legal permission to copy, distribute +and/or modify the software. + + A secondary benefit of defending all users' freedom is that +improvements made in alternate versions of the program, if they +receive widespread use, become available for other developers to +incorporate. Many developers of free software are heartened and +encouraged by the resulting cooperation. However, in the case of +software used on network servers, this result may fail to come about. +The GNU General Public License permits making a modified version and +letting the public access it on a server without ever releasing its +source code to the public. + + The GNU Affero General Public License is designed specifically to +ensure that, in such cases, the modified source code becomes available +to the community. It requires the operator of a network server to +provide the source code of the modified version running there to the +users of that server. Therefore, public use of a modified version, on +a publicly accessible server, gives the public access to the source +code of the modified version. + + An older license, called the Affero General Public License and +published by Affero, was designed to accomplish similar goals. This is +a different license, not a version of the Affero GPL, but Affero has +released a new version of the Affero GPL which permits relicensing under +this license. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU Affero General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. Propagation includes copying, +distribution (with or without modification), making available to the +public, and in some countries other activities as well. + + To "convey" a work means any kind of propagation that enables other +parties to make or receive copies. Mere interaction with a user through +a computer network, with no transfer of a copy, is not conveying. + + An interactive user interface displays "Appropriate Legal Notices" +to the extent that it includes a convenient and prominently visible +feature that (1) displays an appropriate copyright notice, and (2) +tells the user that there is no warranty for the work (except to the +extent that warranties are provided), that licensees may convey the +work under this License, and how to view a copy of this License. If +the interface presents a list of user commands or options, such as a +menu, a prominent item in the list meets this criterion. + + 1. Source Code. + + The "source code" for a work means the preferred form of the work +for making modifications to it. "Object code" means any non-source +form of a work. + + A "Standard Interface" means an interface that either is an official +standard defined by a recognized standards body, or, in the case of +interfaces specified for a particular programming language, one that +is widely used among developers working in that language. + + The "System Libraries" of an executable work include anything, other +than the work as a whole, that (a) is included in the normal form of +packaging a Major Component, but which is not part of that Major +Component, and (b) serves only to enable use of the work with that +Major Component, or to implement a Standard Interface for which an +implementation is available to the public in source code form. A +"Major Component", in this context, means a major essential component +(kernel, window system, and so on) of the specific operating system +(if any) on which the executable work runs, or a compiler used to +produce the work, or an object code interpreter used to run it. + + The "Corresponding Source" for a work in object code form means all +the source code needed to generate, install, and (for an executable +work) run the object code and to modify the work, including scripts to +control those activities. However, it does not include the work's +System Libraries, or general-purpose tools or generally available free +programs which are used unmodified in performing those activities but +which are not part of the work. For example, Corresponding Source +includes interface definition files associated with source files for +the work, and the source code for shared libraries and dynamically +linked subprograms that the work is specifically designed to require, +such as by intimate data communication or control flow between those +subprograms and other parts of the work. + + The Corresponding Source need not include anything that users +can regenerate automatically from other parts of the Corresponding +Source. + + The Corresponding Source for a work in source code form is that +same work. + + 2. Basic Permissions. + + All rights granted under this License are granted for the term of +copyright on the Program, and are irrevocable provided the stated +conditions are met. This License explicitly affirms your unlimited +permission to run the unmodified Program. The output from running a +covered work is covered by this License only if the output, given its +content, constitutes a covered work. This License acknowledges your +rights of fair use or other equivalent, as provided by copyright law. + + You may make, run and propagate covered works that you do not +convey, without conditions so long as your license otherwise remains +in force. You may convey covered works to others for the sole purpose +of having them make modifications exclusively for you, or provide you +with facilities for running those works, provided that you comply with +the terms of this License in conveying all material for which you do +not control copyright. Those thus making or running the covered works +for you must do so exclusively on your behalf, under your direction +and control, on terms that prohibit them from making any copies of +your copyrighted material outside their relationship with you. + + Conveying under any other circumstances is permitted solely under +the conditions stated below. Sublicensing is not allowed; section 10 +makes it unnecessary. + + 3. Protecting Users' Legal Rights From Anti-Circumvention Law. + + No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + + When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such circumvention +is effected by exercising rights under this License with respect to +the covered work, and you disclaim any intention to limit operation or +modification of the work as a means of enforcing, against the work's +users, your or third parties' legal rights to forbid circumvention of +technological measures. + + 4. Conveying Verbatim Copies. + + You may convey verbatim copies of the Program's source code as you +receive it, in any medium, provided that you conspicuously and +appropriately publish on each copy an appropriate copyright notice; +keep intact all notices stating that this License and any +non-permissive terms added in accord with section 7 apply to the code; +keep intact all notices of the absence of any warranty; and give all +recipients a copy of this License along with the Program. + + You may charge any price or no price for each copy that you convey, +and you may offer support or warranty protection for a fee. + + 5. Conveying Modified Source Versions. + + You may convey a work based on the Program, or the modifications to +produce it from the Program, in the form of source code under the +terms of section 4, provided that you also meet all of these conditions: + + a) The work must carry prominent notices stating that you modified + it, and giving a relevant date. + + b) The work must carry prominent notices stating that it is + released under this License and any conditions added under section + 7. This requirement modifies the requirement in section 4 to + "keep intact all notices". + + c) You must license the entire work, as a whole, under this + License to anyone who comes into possession of a copy. This + License will therefore apply, along with any applicable section 7 + additional terms, to the whole of the work, and all its parts, + regardless of how they are packaged. This License gives no + permission to license the work in any other way, but it does not + invalidate such permission if you have separately received it. + + d) If the work has interactive user interfaces, each must display + Appropriate Legal Notices; however, if the Program has interactive + interfaces that do not display Appropriate Legal Notices, your + work need not make them do so. + + A compilation of a covered work with other separate and independent +works, which are not by their nature extensions of the covered work, +and which are not combined with it such as to form a larger program, +in or on a volume of a storage or distribution medium, is called an +"aggregate" if the compilation and its resulting copyright are not +used to limit the access or legal rights of the compilation's users +beyond what the individual works permit. Inclusion of a covered work +in an aggregate does not cause this License to apply to the other +parts of the aggregate. + + 6. Conveying Non-Source Forms. + + You may convey a covered work in object code form under the terms +of sections 4 and 5, provided that you also convey the +machine-readable Corresponding Source under the terms of this License, +in one of these ways: + + a) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by the + Corresponding Source fixed on a durable physical medium + customarily used for software interchange. + + b) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by a + written offer, valid for at least three years and valid for as + long as you offer spare parts or customer support for that product + model, to give anyone who possesses the object code either (1) a + copy of the Corresponding Source for all the software in the + product that is covered by this License, on a durable physical + medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this + conveying of source, or (2) access to copy the + Corresponding Source from a network server at no charge. + + c) Convey individual copies of the object code with a copy of the + written offer to provide the Corresponding Source. This + alternative is allowed only occasionally and noncommercially, and + only if you received the object code with such an offer, in accord + with subsection 6b. + + d) Convey the object code by offering access from a designated + place (gratis or for a charge), and offer equivalent access to the + Corresponding Source in the same way through the same place at no + further charge. You need not require recipients to copy the + Corresponding Source along with the object code. If the place to + copy the object code is a network server, the Corresponding Source + may be on a different server (operated by you or a third party) + that supports equivalent copying facilities, provided you maintain + clear directions next to the object code saying where to find the + Corresponding Source. Regardless of what server hosts the + Corresponding Source, you remain obligated to ensure that it is + available for as long as needed to satisfy these requirements. + + e) Convey the object code using peer-to-peer transmission, provided + you inform other peers where the object code and Corresponding + Source of the work are being offered to the general public at no + charge under subsection 6d. + + A separable portion of the object code, whose source code is excluded +from the Corresponding Source as a System Library, need not be +included in conveying the object code work. + + A "User Product" is either (1) a "consumer product", which means any +tangible personal property which is normally used for personal, family, +or household purposes, or (2) anything designed or sold for incorporation +into a dwelling. In determining whether a product is a consumer product, +doubtful cases shall be resolved in favor of coverage. For a particular +product received by a particular user, "normally used" refers to a +typical or common use of that class of product, regardless of the status +of the particular user or of the way in which the particular user +actually uses, or expects or is expected to use, the product. A product +is a consumer product regardless of whether the product has substantial +commercial, industrial or non-consumer uses, unless such uses represent +the only significant mode of use of the product. + + "Installation Information" for a User Product means any methods, +procedures, authorization keys, or other information required to install +and execute modified versions of a covered work in that User Product from +a modified version of its Corresponding Source. The information must +suffice to ensure that the continued functioning of the modified object +code is in no case prevented or interfered with solely because +modification has been made. + + If you convey an object code work under this section in, or with, or +specifically for use in, a User Product, and the conveying occurs as +part of a transaction in which the right of possession and use of the +User Product is transferred to the recipient in perpetuity or for a +fixed term (regardless of how the transaction is characterized), the +Corresponding Source conveyed under this section must be accompanied +by the Installation Information. But this requirement does not apply +if neither you nor any third party retains the ability to install +modified object code on the User Product (for example, the work has +been installed in ROM). + + The requirement to provide Installation Information does not include a +requirement to continue to provide support service, warranty, or updates +for a work that has been modified or installed by the recipient, or for +the User Product in which it has been modified or installed. Access to a +network may be denied when the modification itself materially and +adversely affects the operation of the network or violates the rules and +protocols for communication across the network. + + Corresponding Source conveyed, and Installation Information provided, +in accord with this section must be in a format that is publicly +documented (and with an implementation available to the public in +source code form), and must require no special password or key for +unpacking, reading or copying. + + 7. Additional Terms. + + "Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) You may place +additional permissions on material, added by you to a covered work, +for which you have or can give appropriate copyright permission. + + Notwithstanding any other provision of this License, for material you +add to a covered work, you may (if authorized by the copyright holders of +that material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the + terms of sections 15 and 16 of this License; or + + b) Requiring preservation of specified reasonable legal notices or + author attributions in that material or in the Appropriate Legal + Notices displayed by works containing it; or + + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in + reasonable ways as different from the original version; or + + d) Limiting the use for publicity purposes of names of licensors or + authors of the material; or + + e) Declining to grant rights under trademark law for use of some + trade names, trademarks, or service marks; or + + f) Requiring indemnification of licensors and authors of that + material by anyone who conveys the material (or modified versions of + it) with contractual assumptions of liability to the recipient, for + any liability that these contractual assumptions directly impose on + those licensors and authors. + + All other non-permissive additional terms are considered "further +restrictions" within the meaning of section 10. If the Program as you +received it, or any part of it, contains a notice stating that it is +governed by this License along with a term that is a further +restriction, you may remove that term. If a license document contains +a further restriction but permits relicensing or conveying under this +License, you may add to a covered work material governed by the terms +of that license document, provided that the further restriction does +not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you +must place, in the relevant source files, a statement of the +additional terms that apply to those files, or a notice indicating +where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the +form of a separately written license, or stated as exceptions; +the above requirements apply either way. + + 8. Termination. + + You may not propagate or modify a covered work except as expressly +provided under this License. Any attempt otherwise to propagate or +modify it is void, and will automatically terminate your rights under +this License (including any patent licenses granted under the third +paragraph of section 11). + + However, if you cease all violation of this License, then your +license from a particular copyright holder is reinstated (a) +provisionally, unless and until the copyright holder explicitly and +finally terminates your license, and (b) permanently, if the copyright +holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + + Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + + Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, you do not qualify to receive new licenses for the same +material under section 10. + + 9. Acceptance Not Required for Having Copies. + + You are not required to accept this License in order to receive or +run a copy of the Program. Ancillary propagation of a covered work +occurring solely as a consequence of using peer-to-peer transmission +to receive a copy likewise does not require acceptance. However, +nothing other than this License grants you permission to propagate or +modify any covered work. These actions infringe copyright if you do +not accept this License. Therefore, by modifying or propagating a +covered work, you indicate your acceptance of this License to do so. + + 10. Automatic Licensing of Downstream Recipients. + + Each time you convey a covered work, the recipient automatically +receives a license from the original licensors, to run, modify and +propagate that work, subject to this License. You are not responsible +for enforcing compliance by third parties with this License. + + An "entity transaction" is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered +work results from an entity transaction, each party to that +transaction who receives a copy of the work also receives whatever +licenses to the work the party's predecessor in interest had or could +give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if +the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the +rights granted or affirmed under this License. For example, you may +not impose a license fee, royalty, or other charge for exercise of +rights granted under this License, and you may not initiate litigation +(including a cross-claim or counterclaim in a lawsuit) alleging that +any patent claim is infringed by making, using, selling, offering for +sale, or importing the Program or any portion of it. + + 11. Patents. + + A "contributor" is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The +work thus licensed is called the contributor's "contributor version". + + A contributor's "essential patent claims" are all patent claims +owned or controlled by the contributor, whether already acquired or +hereafter acquired, that would be infringed by some manner, permitted +by this License, of making, using, or selling its contributor version, +but do not include claims that would be infringed only as a +consequence of further modification of the contributor version. For +purposes of this definition, "control" includes the right to grant +patent sublicenses in a manner consistent with the requirements of +this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free +patent license under the contributor's essential patent claims, to +make, use, sell, offer for sale, import and otherwise run, modify and +propagate the contents of its contributor version. + + In the following three paragraphs, a "patent license" is any express +agreement or commitment, however denominated, not to enforce a patent +(such as an express permission to practice a patent or covenant not to +sue for patent infringement). To "grant" such a patent license to a +party means to make such an agreement or commitment not to enforce a +patent against the party. + + If you convey a covered work, knowingly relying on a patent license, +and the Corresponding Source of the work is not available for anyone +to copy, free of charge and under the terms of this License, through a +publicly available network server or other readily accessible means, +then you must either (1) cause the Corresponding Source to be so +available, or (2) arrange to deprive yourself of the benefit of the +patent license for this particular work, or (3) arrange, in a manner +consistent with the requirements of this License, to extend the patent +license to downstream recipients. "Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. You may not convey a covered +work if you are a party to an arrangement with a third party that is +in the business of distributing software, under which you make payment +to the third party based on the extent of your activity of conveying +the work, and under which the third party grants, to any of the +parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work +conveyed by you (or copies made from those copies), or (b) primarily +for and in connection with specific products or compilations that +contain the covered work, unless you entered into that arrangement, +or that patent license was granted, prior to 28 March 2007. + + Nothing in this License shall be construed as excluding or limiting +any implied license or other defenses to infringement that may +otherwise be available to you under applicable patent law. + + 12. No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Remote Network Interaction; Use with the GNU General Public License. + + Notwithstanding any other provision of this License, if you modify the +Program, your modified version must prominently offer all users +interacting with it remotely through a computer network (if your version +supports such interaction) an opportunity to receive the Corresponding +Source of your version by providing access to the Corresponding Source +from a network server at no charge, through some standard or customary +means of facilitating copying of software. This Corresponding Source +shall include the Corresponding Source for any work covered by version 3 +of the GNU General Public License that is incorporated pursuant to the +following paragraph. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the work with which it is combined will remain governed by version +3 of the GNU General Public License. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU Affero General Public License from time to time. Such new versions +will be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU Affero General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU Affero General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU Affero General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..cf30b98 --- /dev/null +++ b/README.md @@ -0,0 +1,4 @@ +# MOPAC harness + +Headless multi-vertical agent harness in Go. AGPLv3. SoR: Redmine project MOPAC; docs: Discourse; code: Gitea reachableceo/MOPAC. +Spec: DESIGN.md. Status: see Redmine MOPAC project issues. diff --git a/docs/PORTING-NOTES-crush.md b/docs/PORTING-NOTES-crush.md new file mode 100644 index 0000000..c79407b --- /dev/null +++ b/docs/PORTING-NOTES-crush.md @@ -0,0 +1,181 @@ +# Porting notes: crush (reference/crush @ internal/) + +Scope for MOPAC harness: MCP client, sessions/resume, provider routing, +headless loop; OAuth deferred (LiteLLM key suffices). Paths relative to +`reference/crush/`; line refs from study 2026-08-28, drift possible. + +## 1. MCP plumbing + +Code in `internal/agent/tools/mcp/` (NOT `internal/client/` = daemon RPC). +Uses official SDK `modelcontextprotocol/go-sdk/mcp`. +Config: `crush.json` top-level `"mcp"` map name->MCPConfig +(`config/config.go:185-252`, :383/:723): +```json +{ "mcp": { + "local": { "type": "stdio", "command": "npx", "args": ["-y","pkg"], "env": {"K":"V"} }, + "remote": { "type": "http", "url": "http://h/mcp", "headers": {"Authorization":"Bearer $TOKEN"} }, + "legacy": { "type": "sse", "url": "https://h/sse" } } } +``` +- `type`: `stdio`|`sse`|`http` (http=streamable). Extras: `disabled`, + `enabled_tools`/`disabled_tools`, `timeout` secs (dflt 10s, 30s OAuth), + `sessionless`, `oauth*`. `$VAR`/`$(cmd)` expansion: config.go:438-528. + PORT FORMAT VERBATIM for KNEL-AIMiddleware compat. +Transports (`mcp/init.go:1035-1195` createTransport): stdio -> +`mcp.CommandTransport`; env=os.Environ()+resolved; child in own process +group, group SIGKILL + 5s WaitDelay (`process_unix.go:22-40`). PORT: +process-group kill or zombies leak. http -> `mcp.StreamableClientTransport`; +static headers via `headerRoundTripper` (init.go:1197-1206). sse -> +`SSEClientTransport` (legacy, keep for compat). +Health/restart: `getOrRenewClient` (init.go:659-771) — Ping fast path; on +failure teardown->reconnect->re-register tools. Per-server renewal mutex + +generation counters discard stale connects. Config-change reconcile +single-flighted (`mcp/lifecycle.go:45-125`). Init: per-server goroutines + +WaitGroup; `WaitForInit` gates NON-interactive runs only (headless waits, +TUI proceeds lazily). +Tool registration: discovery via `ListTools` on connect + list-changed +subscription (`mcp/tools.go:147-169`). Naming `mcp__` SINGLE +underscores (`agent/tools/mcp-tools.go:58-60`). Adapter maps JSON-Schema +properties/required -> ToolInfo (mcp-tools.go:70-97); results map +text/image/audio, base64-normalized (`tools.go:54-108`). Routing: RunTool -> +client lookup -> CallTool; auto-renews first. Aggregation: per-run palette = +built-ins + `GetMCPTools`, filtered per-agent by AllowedMCP map +(`agent/coordinator.go:768-790`). +Go port: adopt `go-sdk/mcp`; copy config schema, naming convention, +renewal-with-generations, WaitForInit gate. Skip: Claude "channel" push +hack (`mcp/channel.go`), docker-mcp gateway (`config/docker_mcp.go`). + +## 2. Session/persistence + +Single SQLite DB `{dataDir}/crush.db` (default `.crush/` per project, +discovered cwd-up-to-git-root, `config/load.go:574-582`). Sibling +`crush.lock` flock + owner JSON stops concurrent processes +(`db/datadirlock.go`). Schema (`db/migrations/`, goose, sqlc queries in +`db/sql/`): `sessions(uuid, parent_id, title, message_count, tokens, cost, +todos JSON, summary_message_id)`, `messages(id, session_id, role, parts +JSON, model, provider, finished_at)`, `files` (snapshots), `read_files` +(tracker). Parts = `{"type","data"}` array (`message/content.go:56-143`). +Pragmas WAL+busy_timeout=30s; `SetMaxOpenConns(1)` avoids SQLITE_NOTADB +(`db/connect.go:18-41,137-142`). Short user ID = XXH3 hex of UUID +(`session/session.go:28-32`). +`-C/--continue` vs `-s/--session` (mutually exclusive, `cmd/root.go:63`): +Continue = GetLast `ORDER BY updated_at DESC` skipping agent-tool/child +sessions (`app/app.go:238-263`). ID resolve: exact UUID, else XXH3 prefix +scan; 0 hits=not found, >1=ambiguous (`root.go:941-967`). Resume restores +messages+parts, file snapshots, read-files, model from last assistant msg; +NOT restored: permissions, LSP/MCP (re-init). +Crash safety: 33ms debounced writes, sync flush on terminal events +(`message/message.go:218-302`); read-time repair in `agent/agent.go:1527-1708` +— drops orphaned tool results, SYNTHESIZES results for orphaned tool_calls +(interrupted sessions still pass API validation), skips empty cancelled msgs. +PORT THIS — it is what makes resume robust. Harness v1 (bounded turns): +JSONL per session is acceptable; what matters is the repair pass and +finished_at-only-on-Finish-part semantics. + +## 3. Provider layer + +No in-house LLM client: calls delegate to external `charm.land/fantasy`; +catalog from `charm.land/catwalk`. Neither vendored here — harness owns +this layer against LiteLLM (openai-compat): port the CONFIG CONTRACT, not code. +- Catalog: embedded + remote fetch (catwalk.charm.land, ETag) w/ fallback + remote->cache->embedded (`config/catwalk.go:37-90`, `provider.go:37-90`; + cache `~/.local/share/crush/providers.json`, atomic write). Harness: + static embedded catalog, no remote sync. +- Layering low->high (`config/load.go:926-965`): /etc/crush -> + ~/.config/crush -> ~/.local/share/crush -> project walk (.crushrc|crushrc| + .crush.json|crush.json, cwd up to worktree root) -> workspace dataDir copy + LAST. Deep-merge via go-jsons. +- Catalog x user (`load.go:213-365`): `providers.` overrides + base_url/api_key/extra_headers; user `models[]` PREPENDED, wins by ID; + `disable_default_providers` nukes catalog. +- Routing: `parseModelStr` (`app/provider.go:15-27`) — first `/`-segment + vs provider IDs, else whole string is model ID; multi-provider hit -> + error demanding `provider/model`. Defaults from catalog + DefaultLarge/SmallModelID (`load.go:716-789`); per-model overrides + (max_tokens, temperature, reasoning) `load.go:826-899`. Provider + construction switch on Type `agent/coordinator.go:806-1161`. +- Retries: INSIDE fantasy, not this repo. Crush only observes: `OnRetry` + resets streamed content so retry doesn't concatenate (`agent/agent.go:931-941`); + `OnAuthRefresh` = transparent 401 retry (:127). PORT: harness-layer retry + (429/5xx/transport backoff) + reset partial assistant buffer first. +Stream-truncation surfacing (z.ai "Message content shorter than read +bytes"): stream errors classified at `agent/agent.go:1067-1189`; +`IsTransportError` -> FinishReasonError w/ wrapped err (:1177) — unexpected +EOF lands here. In headless, the z.ai-class error is DETECTED at +`app/app.go:414-416` (reconciles streamed bytes vs final msg, fails the +run, exit 1). Zero-usage fallback: `agent/usage_fallback.go`. Harness v1: +on EOF/short-read, retry request (per DESIGN retry/backoff) and resume +turn from persisted messages; reuse delta-cursor print (app.go:406-431). + +## 4. Headless mode + +No `-p`/`--print` exists. Headless = `crush run|r [prompt...]` +(`cmd/run.go:31-169`). Prompt = args joined + stdin (pipe/file, not TTY) +PREPENDED (`root.go:918-935`); empty -> error. Output: plain markdown to +stdout; spinner only if stderr is TTY. Flags: -q, -v, -m provider/model, +--small-model, -s, -C. Two paths: in-process (`app.RunNonInteractive`, +`app/app.go:267-438`) or client/server SSE (`run.go:334-455`). Port: +- Delta printing: track messageReadBytes per msg id, print only + `content[readBytes:]` (app.go:406-431). Server path keys completion on + RunComplete event by runID, NOT message finish (tool_use mid-turn + regression, run.go:385-397). +- Permissions headless: session auto-approved wholesale + (`AutoApproveSession` app.go:349; permission.go:280-284) — never blocks; + interactive-only tools excluded (`initCoderAgent(false)` app.go:674-703). + Harness: invert — per-vertical allowlist, deny-default, no auto-approve. +- Exit codes: 0/1 only. 1 = RunE error (no prompt, no providers, agent + error, run failed); CANCEL returns 0 (app.go:398-401); tool failures do + NOT affect exit. Harness: distinct codes gate/budget/agent/tool. + +## 5. OAuth (deferred v1 — code map) + +- Hyper device-code flow: `oauth/hyper/device.go` (:40 initiate, :87 poll, + :153 refresh-exchange). Copilot device flow + GH->Copilot token exchange: + `oauth/copilot/oauth.go` (:36,:69,:149), disk import `copilot/disk.go`, + spoof headers `copilot/http.go`. Login CLI: `cmd/login.go`, `cmd/logout.go`. +- MCP OAuth 2.1 auth-code+PKCE, dynamic client registration (RFC 7591), + PR metadata (8414/8707): `oauth/mcp/handler.go:110-219`. Loopback + `/callback`, ports 40704-40713 first-free (pin via `oauth_callback_port`); + listener bound only during in-flight auth (:487); concurrent 401s deduped + to one browser tab (`authFlight` :420). Tokens -> config key + `mcp..oauth_token`; save-on-change wrapper + `oauth/mcp/savingtokensource.go`. Browser suppressed non-interactive + (`ErrInteractiveAuthRequired` handler.go:32). If harness needs OAuth, + port THIS flow (MCP); provider OAuth moot behind LiteLLM. +Token plumbing: access token stored AS `providers..api_key` +(`config/store.go:564-595`); refresh singleflight + cross-process flock +`/locks/.refresh.lock`, adopts peer-rotated token +(store.go:658-903). Token model `oauth/token.go`. Anthropic Claude- +subscription OAuth: REMOVED (`config/load.go:306-314`). + +## 6. Reading list + gotchas + +Top 10 to read in detail during build: +1. `internal/agent/tools/mcp/init.go` (1332 ln) — sessions, transports, + renewal; MCP port blueprint. +2. `internal/agent/tools/mcp-tools.go` + `mcp/tools.go` — tool adapter, + naming, filtering, result mapping. +3. `internal/agent/agent.go` (2288 ln) — stream callbacks, error + classification, prompt repair (:1527-1708). +4. `internal/app/app.go` — RunNonInteractive, resolveSession, delta print. +5. `internal/cmd/run.go` + `cmd/root.go` — headless flags, stdin handling, + config discovery walk. +6. `internal/config/load.go` — config layering/merge, model resolution. +7. `internal/message/message.go` + `content.go` — debounced persistence, + part model. +8. `internal/session/session.go` + `db/sql/` — session service + queries. +9. `internal/permission/permission.go` — precedence chain (skip -> + allowed_tools -> hook -> auto-approve -> interactive). +10. `internal/agent/coordinator.go` — tool palette assembly, provider + construction, AllowedMCP filtering. +Gotchas: +1. `internal/client/` is daemon RPC, not LLM/MCP — don't port by name. + LLM lives in external `charm.land/fantasy` (not vendored here). +2. MCP tool names use SINGLE underscores (`mcp_server_tool`); double- + underscore assumption breaks KNEL compat. +3. stdio MCP children need own process group + group kill; plain Kill + orphans grandchildren (`process_unix.go`). +4. Retries concatenate partial stream output unless the assistant buffer + is reset first (`agent.go:931-941` OnRetry pattern). +5. Resume correctness lives in read-time repair (orphaned tool_call/result + synthesis), not write-time transactions — skipping it makes every + interrupted session permanently API-invalid.